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        <a href="metageta-module.html">Package&nbsp;metageta</a> ::
        Module&nbsp;overviews
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<h1 class="epydoc">Source Code for <a href="metageta.overviews-module.html">Module metageta.overviews</a></h1>
<pre class="py-src">
<a name="L1"></a><tt class="py-lineno">  1</tt>  <tt class="py-line"><tt class="py-comment"># -*- coding: utf-8 -*-</tt> </tt>
<a name="L2"></a><tt class="py-lineno">  2</tt>  <tt class="py-line"><tt class="py-comment"># Copyright (c) 2011 Australian Government, Department of Sustainability, Environment, Water, Population and Communities</tt> </tt>
<a name="L3"></a><tt class="py-lineno">  3</tt>  <tt class="py-line"><tt class="py-comment">#</tt> </tt>
<a name="L4"></a><tt class="py-lineno">  4</tt>  <tt class="py-line"><tt class="py-comment"># Permission is hereby granted, free of charge, to any person obtaining a copy</tt> </tt>
<a name="L5"></a><tt class="py-lineno">  5</tt>  <tt class="py-line"><tt class="py-comment"># of this software and associated documentation files (the "Software"), to deal</tt> </tt>
<a name="L6"></a><tt class="py-lineno">  6</tt>  <tt class="py-line"><tt class="py-comment"># in the Software without restriction, including without limitation the rights</tt> </tt>
<a name="L7"></a><tt class="py-lineno">  7</tt>  <tt class="py-line"><tt class="py-comment"># to use, copy, modify, merge, publish, distribute, sublicense, and/or sell</tt> </tt>
<a name="L8"></a><tt class="py-lineno">  8</tt>  <tt class="py-line"><tt class="py-comment"># copies of the Software, and to permit persons to whom the Software is</tt> </tt>
<a name="L9"></a><tt class="py-lineno">  9</tt>  <tt class="py-line"><tt class="py-comment"># furnished to do so, subject to the following conditions:</tt> </tt>
<a name="L10"></a><tt class="py-lineno"> 10</tt>  <tt class="py-line"><tt class="py-comment">#</tt> </tt>
<a name="L11"></a><tt class="py-lineno"> 11</tt>  <tt class="py-line"><tt class="py-comment"># The above copyright notice and this permission notice shall be included in</tt> </tt>
<a name="L12"></a><tt class="py-lineno"> 12</tt>  <tt class="py-line"><tt class="py-comment"># all copies or substantial portions of the Software.</tt> </tt>
<a name="L13"></a><tt class="py-lineno"> 13</tt>  <tt class="py-line"><tt class="py-comment">#</tt> </tt>
<a name="L14"></a><tt class="py-lineno"> 14</tt>  <tt class="py-line"><tt class="py-comment"># THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</tt> </tt>
<a name="L15"></a><tt class="py-lineno"> 15</tt>  <tt class="py-line"><tt class="py-comment"># IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</tt> </tt>
<a name="L16"></a><tt class="py-lineno"> 16</tt>  <tt class="py-line"><tt class="py-comment"># FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</tt> </tt>
<a name="L17"></a><tt class="py-lineno"> 17</tt>  <tt class="py-line"><tt class="py-comment"># AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</tt> </tt>
<a name="L18"></a><tt class="py-lineno"> 18</tt>  <tt class="py-line"><tt class="py-comment"># LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</tt> </tt>
<a name="L19"></a><tt class="py-lineno"> 19</tt>  <tt class="py-line"><tt class="py-comment"># OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN</tt> </tt>
<a name="L20"></a><tt class="py-lineno"> 20</tt>  <tt class="py-line"><tt class="py-comment"># THE SOFTWARE.</tt> </tt>
<a name="L21"></a><tt class="py-lineno"> 21</tt>  <tt class="py-line"> </tt>
<a name="L22"></a><tt class="py-lineno"> 22</tt>  <tt class="py-line"><tt class="py-docstring">'''</tt> </tt>
<a name="L23"></a><tt class="py-lineno"> 23</tt>  <tt class="py-line"><tt class="py-docstring">Generate overviews for imagery</tt> </tt>
<a name="L24"></a><tt class="py-lineno"> 24</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L25"></a><tt class="py-lineno"> 25</tt>  <tt class="py-line"><tt class="py-docstring">@note:This module is not generally used on its own, but may be if required.</tt> </tt>
<a name="L26"></a><tt class="py-lineno"> 26</tt>  <tt class="py-line"><tt class="py-docstring">      It's is usually used only by L{Dataset.getoverview()&lt;formats.__dataset__.Dataset.getoverview&gt;} methods.</tt> </tt>
<a name="L27"></a><tt class="py-lineno"> 27</tt>  <tt class="py-line"><tt class="py-docstring">'''</tt> </tt>
<a name="L28"></a><tt class="py-lineno"> 28</tt>  <tt class="py-line"> </tt>
<a name="L29"></a><tt class="py-lineno"> 29</tt>  <tt class="py-line"><tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
<a name="L30"></a><tt class="py-lineno"> 30</tt>  <tt class="py-line">    <tt class="py-keyword">from</tt> <tt class="py-name">osgeo</tt> <tt class="py-keyword">import</tt> <tt class="py-name">gdal</tt> </tt>
<a name="L31"></a><tt class="py-lineno"> 31</tt>  <tt class="py-line">    <tt class="py-keyword">from</tt> <tt class="py-name">osgeo</tt> <tt class="py-keyword">import</tt> <tt class="py-name">gdalconst</tt> </tt>
<a name="L32"></a><tt class="py-lineno"> 32</tt>  <tt class="py-line">    <tt class="py-keyword">from</tt> <tt class="py-name">osgeo</tt> <tt class="py-keyword">import</tt> <tt class="py-name">osr</tt> </tt>
<a name="L33"></a><tt class="py-lineno"> 33</tt>  <tt class="py-line">    <tt class="py-keyword">from</tt> <tt class="py-name">osgeo</tt> <tt class="py-keyword">import</tt> <tt class="py-name">ogr</tt> </tt>
<a name="L34"></a><tt class="py-lineno"> 34</tt>  <tt class="py-line"><tt class="py-keyword">except</tt> <tt class="py-name">ImportError</tt><tt class="py-op">:</tt> </tt>
<a name="L35"></a><tt class="py-lineno"> 35</tt>  <tt class="py-line">    <tt class="py-keyword">import</tt> <tt class="py-name">gdal</tt> </tt>
<a name="L36"></a><tt class="py-lineno"> 36</tt>  <tt class="py-line">    <tt class="py-keyword">import</tt> <tt class="py-name">gdalconst</tt> </tt>
<a name="L37"></a><tt class="py-lineno"> 37</tt>  <tt class="py-line">    <tt class="py-keyword">import</tt> <tt class="py-name">osr</tt> </tt>
<a name="L38"></a><tt class="py-lineno"> 38</tt>  <tt class="py-line">    <tt class="py-keyword">import</tt> <tt class="py-name">ogr</tt> </tt>
<a name="L39"></a><tt class="py-lineno"> 39</tt>  <tt class="py-line"><tt class="py-keyword">from</tt> <tt id="link-0" class="py-name" targets="Package metageta=metageta-module.html"><a title="metageta" class="py-name" href="#" onclick="return doclink('link-0', 'metageta', 'link-0');">metageta</a></tt> <tt class="py-keyword">import</tt> <tt id="link-1" class="py-name" targets="Module metageta.geometry=metageta.geometry-module.html"><a title="metageta.geometry" class="py-name" href="#" onclick="return doclink('link-1', 'geometry', 'link-1');">geometry</a></tt><tt class="py-op">,</tt><tt id="link-2" class="py-name" targets="Module metageta.utilities=metageta.utilities-module.html"><a title="metageta.utilities" class="py-name" href="#" onclick="return doclink('link-2', 'utilities', 'link-2');">utilities</a></tt> </tt>
<a name="L40"></a><tt class="py-lineno"> 40</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">sys</tt><tt class="py-op">,</tt> <tt class="py-name">os</tt><tt class="py-op">.</tt><tt class="py-name">path</tt><tt class="py-op">,</tt> <tt class="py-name">os</tt><tt class="py-op">,</tt> <tt class="py-name">csv</tt><tt class="py-op">,</tt> <tt class="py-name">re</tt><tt class="py-op">,</tt> <tt class="py-name">struct</tt><tt class="py-op">,</tt> <tt class="py-name">math</tt><tt class="py-op">,</tt> <tt class="py-name">glob</tt><tt class="py-op">,</tt> <tt class="py-name">string</tt><tt class="py-op">,</tt> <tt class="py-name">time</tt><tt class="py-op">,</tt><tt class="py-name">shutil</tt><tt class="py-op">,</tt> <tt class="py-name">tempfile</tt> </tt>
<a name="L41"></a><tt class="py-lineno"> 41</tt>  <tt class="py-line"> </tt>
<a name="getoverview"></a><div id="getoverview-def"><a name="L42"></a><tt class="py-lineno"> 42</tt> <a class="py-toggle" href="#" id="getoverview-toggle" onclick="return toggle('getoverview');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#getoverview">getoverview</a><tt class="py-op">(</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">outfile</tt><tt class="py-op">,</tt><tt class="py-param">width</tt><tt class="py-op">,</tt><tt class="py-param">format</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">,</tt><tt class="py-param">stretch_type</tt><tt class="py-op">,</tt><tt class="py-op">*</tt><tt class="py-param">stretch_args</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="getoverview-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="getoverview-expanded"><a name="L43"></a><tt class="py-lineno"> 43</tt>  <tt class="py-line">    <tt class="py-docstring">'''</tt> </tt>
<a name="L44"></a><tt class="py-lineno"> 44</tt>  <tt class="py-line"><tt class="py-docstring">    Generate overviews for imagery</tt> </tt>
<a name="L45"></a><tt class="py-lineno"> 45</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L46"></a><tt class="py-lineno"> 46</tt>  <tt class="py-line"><tt class="py-docstring">    @type  ds:      C{GDALDataset}</tt> </tt>
<a name="L47"></a><tt class="py-lineno"> 47</tt>  <tt class="py-line"><tt class="py-docstring">    @param ds:      a GDALDataset object</tt> </tt>
<a name="L48"></a><tt class="py-lineno"> 48</tt>  <tt class="py-line"><tt class="py-docstring">    @type  outfile: C{str}</tt> </tt>
<a name="L49"></a><tt class="py-lineno"> 49</tt>  <tt class="py-line"><tt class="py-docstring">    @param outfile: a filepath to the output overview image. If supplied, format is determined from the file extension</tt> </tt>
<a name="L50"></a><tt class="py-lineno"> 50</tt>  <tt class="py-line"><tt class="py-docstring">    @type  width:   C{int}</tt> </tt>
<a name="L51"></a><tt class="py-lineno"> 51</tt>  <tt class="py-line"><tt class="py-docstring">    @param width:   output image width</tt> </tt>
<a name="L52"></a><tt class="py-lineno"> 52</tt>  <tt class="py-line"><tt class="py-docstring">    @type  format:  C{str}</tt> </tt>
<a name="L53"></a><tt class="py-lineno"> 53</tt>  <tt class="py-line"><tt class="py-docstring">    @param format:  format to generate overview image, one of ['JPG','PNG','GIF','BMP','TIF']. Not required if outfile is supplied.</tt> </tt>
<a name="L54"></a><tt class="py-lineno"> 54</tt>  <tt class="py-line"><tt class="py-docstring">    @type  bands:   C{list}</tt> </tt>
<a name="L55"></a><tt class="py-lineno"> 55</tt>  <tt class="py-line"><tt class="py-docstring">    @param bands:   list of band numbers (base 1) in processing order - e.g [3,2,1]</tt> </tt>
<a name="L56"></a><tt class="py-lineno"> 56</tt>  <tt class="py-line"><tt class="py-docstring">    @type  stretch_type:  C{str}</tt> </tt>
<a name="L57"></a><tt class="py-lineno"> 57</tt>  <tt class="py-line"><tt class="py-docstring">    @param stretch_type:  stretch to apply to overview image,</tt> </tt>
<a name="L58"></a><tt class="py-lineno"> 58</tt>  <tt class="py-line"><tt class="py-docstring">                          one of [L{NONE&lt;_stretch_NONE&gt;},L{PERCENT&lt;_stretch_PERCENT&gt;},L{MINMAX&lt;_stretch_MINMAX&gt;},L{STDDEV&lt;_stretch_STDDEV&gt;},L{COLOURTABLE&lt;_stretch_COLOURTABLE&gt;},L{COLOURTABLELUT&lt;_stretch_COLOURTABLELUT&gt;},L{RANDOM&lt;_stretch_RANDOM&gt;},L{UNIQUE&lt;_stretch_UNIQUE&gt;}].</tt> </tt>
<a name="L59"></a><tt class="py-lineno"> 59</tt>  <tt class="py-line"><tt class="py-docstring">    @type stretch_args:   C{list}</tt> </tt>
<a name="L60"></a><tt class="py-lineno"> 60</tt>  <tt class="py-line"><tt class="py-docstring">    @param stretch_args:  args to pass to the stretch algorithms</tt> </tt>
<a name="L61"></a><tt class="py-lineno"> 61</tt>  <tt class="py-line"><tt class="py-docstring">    @rtype:         C{str}</tt> </tt>
<a name="L62"></a><tt class="py-lineno"> 62</tt>  <tt class="py-line"><tt class="py-docstring">    @return:        filepath (if outfile is supplied)/binary image data (if outfile is not supplied)</tt> </tt>
<a name="L63"></a><tt class="py-lineno"> 63</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L64"></a><tt class="py-lineno"> 64</tt>  <tt class="py-line"> </tt>
<a name="L65"></a><tt class="py-lineno"> 65</tt>  <tt class="py-line">    <tt class="py-comment">#mapping table for file extension -&gt; GDAL format code</tt> </tt>
<a name="L66"></a><tt class="py-lineno"> 66</tt>  <tt class="py-line">    <tt class="py-name">imageformats</tt><tt class="py-op">=</tt><tt class="py-op">{</tt><tt class="py-string">'JPG'</tt><tt class="py-op">:</tt><tt class="py-string">'JPEG'</tt><tt class="py-op">,</tt> <tt class="py-comment">#JPEG JFIF (.jpg)</tt> </tt>
<a name="L67"></a><tt class="py-lineno"> 67</tt>  <tt class="py-line">                  <tt class="py-string">'PNG'</tt><tt class="py-op">:</tt><tt class="py-string">'PNG'</tt><tt class="py-op">,</tt>  <tt class="py-comment">#Portable Network Graphics (.png)</tt> </tt>
<a name="L68"></a><tt class="py-lineno"> 68</tt>  <tt class="py-line">                  <tt class="py-string">'GIF'</tt><tt class="py-op">:</tt><tt class="py-string">'GIF'</tt><tt class="py-op">,</tt>  <tt class="py-comment">#Graphics Interchange Format (.gif)</tt> </tt>
<a name="L69"></a><tt class="py-lineno"> 69</tt>  <tt class="py-line">                  <tt class="py-string">'BMP'</tt><tt class="py-op">:</tt><tt class="py-string">'BMP'</tt><tt class="py-op">,</tt>  <tt class="py-comment">#Microsoft Windows Device Independent Bitmap (.bmp)</tt> </tt>
<a name="L70"></a><tt class="py-lineno"> 70</tt>  <tt class="py-line">                  <tt class="py-string">'TIF'</tt><tt class="py-op">:</tt><tt class="py-string">'GTiff'</tt> <tt class="py-comment">#Tagged Image File Format/GeoTIFF (.tif)</tt> </tt>
<a name="L71"></a><tt class="py-lineno"> 71</tt>  <tt class="py-line">                 <tt class="py-op">}</tt> </tt>
<a name="L72"></a><tt class="py-lineno"> 72</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">outfile</tt><tt class="py-op">:</tt> </tt>
<a name="L73"></a><tt class="py-lineno"> 73</tt>  <tt class="py-line">        <tt class="py-name">outfile</tt><tt class="py-op">=</tt><tt id="link-3" class="py-name"><a title="metageta.utilities" class="py-name" href="#" onclick="return doclink('link-3', 'utilities', 'link-2');">utilities</a></tt><tt class="py-op">.</tt><tt id="link-4" class="py-name" targets="Function metageta.utilities.encode()=metageta.utilities-module.html#encode"><a title="metageta.utilities.encode" class="py-name" href="#" onclick="return doclink('link-4', 'encode', 'link-4');">encode</a></tt><tt class="py-op">(</tt><tt class="py-name">outfile</tt><tt class="py-op">)</tt> </tt>
<a name="L74"></a><tt class="py-lineno"> 74</tt>  <tt class="py-line">        <tt id="link-5" class="py-name" targets="Variable metageta.icons.app_img.format=metageta.icons.app_img-class.html#format,Variable metageta.icons.dir_img.format=metageta.icons.dir_img-class.html#format,Variable metageta.icons.log_img.format=metageta.icons.log_img-class.html#format,Variable metageta.icons.shp_img.format=metageta.icons.shp_img-class.html#format,Variable metageta.icons.xls_img.format=metageta.icons.xls_img-class.html#format,Variable metageta.icons.xsl_img.format=metageta.icons.xsl_img-class.html#format"><a title="metageta.icons.app_img.format
metageta.icons.dir_img.format
metageta.icons.log_img.format
metageta.icons.shp_img.format
metageta.icons.xls_img.format
metageta.icons.xsl_img.format" class="py-name" href="#" onclick="return doclink('link-5', 'format', 'link-5');">format</a></tt><tt class="py-op">=</tt><tt class="py-name">os</tt><tt class="py-op">.</tt><tt class="py-name">path</tt><tt class="py-op">.</tt><tt class="py-name">splitext</tt><tt class="py-op">(</tt><tt class="py-name">outfile</tt><tt class="py-op">)</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">replace</tt><tt class="py-op">(</tt><tt class="py-string">'.'</tt><tt class="py-op">,</tt><tt class="py-string">''</tt><tt class="py-op">)</tt>                  <tt class="py-comment">#overrides "format" arg if supplied</tt> </tt>
<a name="L75"></a><tt class="py-lineno"> 75</tt>  <tt class="py-line">    <tt class="py-name">ovdriver</tt><tt class="py-op">=</tt><tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">GetDriverByName</tt><tt class="py-op">(</tt><tt class="py-name">imageformats</tt><tt class="py-op">.</tt><tt class="py-name">get</tt><tt class="py-op">(</tt><tt id="link-6" class="py-name"><a title="metageta.icons.app_img.format
metageta.icons.dir_img.format
metageta.icons.log_img.format
metageta.icons.shp_img.format
metageta.icons.xls_img.format
metageta.icons.xsl_img.format" class="py-name" href="#" onclick="return doclink('link-6', 'format', 'link-5');">format</a></tt><tt class="py-op">.</tt><tt class="py-name">upper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-string">'JPEG'</tt><tt class="py-op">)</tt><tt class="py-op">)</tt>  <tt class="py-comment">#Get format code, default to 'JPEG' if supplied format doesn't match the predefined ones...</tt> </tt>
<a name="L76"></a><tt class="py-lineno"> 76</tt>  <tt class="py-line"> </tt>
<a name="L77"></a><tt class="py-lineno"> 77</tt>  <tt class="py-line">    <tt class="py-name">cols</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterXSize</tt> </tt>
<a name="L78"></a><tt class="py-lineno"> 78</tt>  <tt class="py-line">    <tt class="py-name">rows</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterYSize</tt> </tt>
<a name="L79"></a><tt class="py-lineno"> 79</tt>  <tt class="py-line">    <tt class="py-name">vrtcols</tt><tt class="py-op">=</tt><tt class="py-name">width</tt> </tt>
<a name="L80"></a><tt class="py-lineno"> 80</tt>  <tt class="py-line">    <tt class="py-name">vrtrows</tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">math</tt><tt class="py-op">.</tt><tt class="py-name">ceil</tt><tt class="py-op">(</tt><tt class="py-name">width</tt><tt class="py-op">*</tt><tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">rows</tt><tt class="py-op">)</tt><tt class="py-op">/</tt><tt class="py-name">cols</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L81"></a><tt class="py-lineno"> 81</tt>  <tt class="py-line"> </tt>
<a name="L82"></a><tt class="py-lineno"> 82</tt>  <tt class="py-line">    <tt class="py-name">vrtdrv</tt><tt class="py-op">=</tt><tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">GetDriverByName</tt><tt class="py-op">(</tt><tt class="py-string">'VRT'</tt><tt class="py-op">)</tt> </tt>
<a name="L83"></a><tt class="py-lineno"> 83</tt>  <tt class="py-line">    <tt class="py-name">tempvrts</tt><tt class="py-op">=</tt><tt class="py-op">{</tt><tt class="py-op">}</tt> <tt class="py-comment">#dict with keys=file descriptor and values=[filename,GDALDataset]</tt> </tt>
<a name="L84"></a><tt class="py-lineno"> 84</tt>  <tt class="py-line"> </tt>
<a name="L85"></a><tt class="py-lineno"> 85</tt>  <tt class="py-line">    <tt class="py-comment">#Below is a bit of a kludge to handle creating a VRT that is based on an in-memory vrt file</tt> </tt>
<a name="L86"></a><tt class="py-lineno"> 86</tt>  <tt class="py-line">    <tt class="py-name">drv</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDriver</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">.</tt><tt class="py-name">ShortName</tt> </tt>
<a name="L87"></a><tt class="py-lineno"> 87</tt>  <tt class="py-line">    <tt class="py-name">desc</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDescription</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L88"></a><tt class="py-lineno"> 88</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">drv</tt> <tt class="py-op">==</tt> <tt class="py-string">'VRT'</tt><tt class="py-op">:</tt> </tt>
<a name="L89"></a><tt class="py-lineno"> 89</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">desc</tt> <tt class="py-keyword">or</tt> <tt class="py-name">desc</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> <tt class="py-op">==</tt> <tt class="py-string">'&lt;'</tt><tt class="py-op">:</tt><tt class="py-comment"># input path is an in-memory vrt file</tt> </tt>
<a name="L90"></a><tt class="py-lineno"> 90</tt>  <tt class="py-line">            <tt class="py-name">vrtfd</tt><tt class="py-op">,</tt><tt class="py-name">vrtfn</tt><tt class="py-op">=</tt><tt class="py-name">tempfile</tt><tt class="py-op">.</tt><tt class="py-name">mkstemp</tt><tt class="py-op">(</tt><tt class="py-string">'.vrt'</tt><tt class="py-op">)</tt> </tt>
<a name="L91"></a><tt class="py-lineno"> 91</tt>  <tt class="py-line">            <tt class="py-name">ds</tt><tt class="py-op">=</tt><tt class="py-name">vrtdrv</tt><tt class="py-op">.</tt><tt class="py-name">CreateCopy</tt><tt class="py-op">(</tt><tt class="py-name">vrtfn</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">)</tt> </tt>
<a name="L92"></a><tt class="py-lineno"> 92</tt>  <tt class="py-line">            <tt class="py-name">tempvrts</tt><tt class="py-op">[</tt><tt class="py-name">vrtfd</tt><tt class="py-op">]</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-name">vrtfn</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">]</tt> </tt>
<a name="L93"></a><tt class="py-lineno"> 93</tt>  <tt class="py-line"> </tt>
<a name="L94"></a><tt class="py-lineno"> 94</tt>  <tt class="py-line">    <tt class="py-comment">#if stretch_type != 'NONE':</tt> </tt>
<a name="L95"></a><tt class="py-lineno"> 95</tt>  <tt class="py-line">    <tt class="py-comment">#    tmpxml=stretch('NONE',vrtcols,vrtrows,ds,bands)</tt> </tt>
<a name="L96"></a><tt class="py-lineno"> 96</tt>  <tt class="py-line">    <tt class="py-comment">#    vrtfd,vrtfn=tempfile.mkstemp('.vrt')</tt> </tt>
<a name="L97"></a><tt class="py-lineno"> 97</tt>  <tt class="py-line">    <tt class="py-comment">#    ds=vrtdrv.CreateCopy(vrtfn,geometry.OpenDataset(tmpxml))</tt> </tt>
<a name="L98"></a><tt class="py-lineno"> 98</tt>  <tt class="py-line">    <tt class="py-comment">#    tempvrts[vrtfd]=[vrtfn,ds]</tt> </tt>
<a name="L99"></a><tt class="py-lineno"> 99</tt>  <tt class="py-line"> </tt>
<a name="L100"></a><tt class="py-lineno">100</tt>  <tt class="py-line">    <tt class="py-name">vrtxml</tt><tt class="py-op">=</tt><tt id="link-7" class="py-name" targets="Function metageta.overviews.stretch()=metageta.overviews-module.html#stretch"><a title="metageta.overviews.stretch" class="py-name" href="#" onclick="return doclink('link-7', 'stretch', 'link-7');">stretch</a></tt><tt class="py-op">(</tt><tt class="py-name">stretch_type</tt><tt class="py-op">,</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">,</tt><tt class="py-name">bands</tt><tt class="py-op">,</tt><tt class="py-op">*</tt><tt class="py-name">stretch_args</tt><tt class="py-op">)</tt> </tt>
<a name="L101"></a><tt class="py-lineno">101</tt>  <tt class="py-line">    <tt class="py-name">vrtds</tt><tt class="py-op">=</tt><tt id="link-8" class="py-name"><a title="metageta.geometry" class="py-name" href="#" onclick="return doclink('link-8', 'geometry', 'link-1');">geometry</a></tt><tt class="py-op">.</tt><tt id="link-9" class="py-name" targets="Function metageta.geometry.OpenDataset()=metageta.geometry-module.html#OpenDataset"><a title="metageta.geometry.OpenDataset" class="py-name" href="#" onclick="return doclink('link-9', 'OpenDataset', 'link-9');">OpenDataset</a></tt><tt class="py-op">(</tt><tt class="py-name">vrtxml</tt><tt class="py-op">)</tt> </tt>
<a name="L102"></a><tt class="py-lineno">102</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">outfile</tt><tt class="py-op">:</tt> </tt>
<a name="L103"></a><tt class="py-lineno">103</tt>  <tt class="py-line">        <tt class="py-name">cpds</tt><tt class="py-op">=</tt><tt class="py-name">ovdriver</tt><tt class="py-op">.</tt><tt class="py-name">CreateCopy</tt><tt class="py-op">(</tt><tt class="py-name">outfile</tt><tt class="py-op">,</tt> <tt class="py-name">vrtds</tt><tt class="py-op">)</tt> </tt>
<a name="L104"></a><tt class="py-lineno">104</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">cpds</tt><tt class="py-op">:</tt><tt class="py-keyword">raise</tt> <tt id="link-10" class="py-name"><a title="metageta.geometry" class="py-name" href="#" onclick="return doclink('link-10', 'geometry', 'link-1');">geometry</a></tt><tt class="py-op">.</tt><tt id="link-11" class="py-name" targets="Class metageta.geometry.GDALError=metageta.geometry.GDALError-class.html"><a title="metageta.geometry.GDALError" class="py-name" href="#" onclick="return doclink('link-11', 'GDALError', 'link-11');">GDALError</a></tt><tt class="py-op">,</tt> <tt class="py-string">'Unable to generate overview image.'</tt> </tt>
<a name="L105"></a><tt class="py-lineno">105</tt>  <tt class="py-line">    <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L106"></a><tt class="py-lineno">106</tt>  <tt class="py-line">        <tt class="py-name">fd</tt><tt class="py-op">,</tt><tt class="py-name">fn</tt><tt class="py-op">=</tt><tt class="py-name">tempfile</tt><tt class="py-op">.</tt><tt class="py-name">mkstemp</tt><tt class="py-op">(</tt><tt class="py-name">suffix</tt><tt class="py-op">=</tt><tt class="py-string">'.'</tt><tt class="py-op">+</tt><tt id="link-12" class="py-name"><a title="metageta.icons.app_img.format
metageta.icons.dir_img.format
metageta.icons.log_img.format
metageta.icons.shp_img.format
metageta.icons.xls_img.format
metageta.icons.xsl_img.format" class="py-name" href="#" onclick="return doclink('link-12', 'format', 'link-5');">format</a></tt><tt class="py-op">.</tt><tt class="py-name">lower</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">prefix</tt><tt class="py-op">=</tt><tt class="py-string">'getoverviewtempimage'</tt><tt class="py-op">)</tt> </tt>
<a name="L107"></a><tt class="py-lineno">107</tt>  <tt class="py-line">        <tt class="py-name">cpds</tt><tt class="py-op">=</tt><tt class="py-name">ovdriver</tt><tt class="py-op">.</tt><tt class="py-name">CreateCopy</tt><tt class="py-op">(</tt><tt class="py-name">fn</tt><tt class="py-op">,</tt> <tt class="py-name">vrtds</tt><tt class="py-op">)</tt> </tt>
<a name="L108"></a><tt class="py-lineno">108</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">cpds</tt><tt class="py-op">:</tt><tt class="py-keyword">raise</tt> <tt id="link-13" class="py-name"><a title="metageta.geometry" class="py-name" href="#" onclick="return doclink('link-13', 'geometry', 'link-1');">geometry</a></tt><tt class="py-op">.</tt><tt id="link-14" class="py-name"><a title="metageta.geometry.GDALError" class="py-name" href="#" onclick="return doclink('link-14', 'GDALError', 'link-11');">GDALError</a></tt><tt class="py-op">,</tt> <tt class="py-string">'Unable to generate overview image.'</tt> </tt>
<a name="L109"></a><tt class="py-lineno">109</tt>  <tt class="py-line"> </tt>
<a name="L110"></a><tt class="py-lineno">110</tt>  <tt class="py-line">        <tt class="py-name">outfile</tt><tt class="py-op">=</tt><tt class="py-name">os</tt><tt class="py-op">.</tt><tt class="py-name">fdopen</tt><tt class="py-op">(</tt><tt class="py-name">fd</tt><tt class="py-op">)</tt><tt class="py-op">.</tt><tt class="py-name">read</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L111"></a><tt class="py-lineno">111</tt>  <tt class="py-line">        <tt class="py-name">os</tt><tt class="py-op">.</tt><tt class="py-name">unlink</tt><tt class="py-op">(</tt><tt class="py-name">fn</tt><tt class="py-op">)</tt> </tt>
<a name="L112"></a><tt class="py-lineno">112</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">vrt</tt> <tt class="py-keyword">in</tt> <tt class="py-name">tempvrts</tt><tt class="py-op">:</tt> </tt>
<a name="L113"></a><tt class="py-lineno">113</tt>  <tt class="py-line">        <tt class="py-name">tempvrts</tt><tt class="py-op">[</tt><tt class="py-name">vrt</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">=</tt><tt class="py-name">None</tt> </tt>
<a name="L114"></a><tt class="py-lineno">114</tt>  <tt class="py-line">        <tt class="py-name">os</tt><tt class="py-op">.</tt><tt id="link-15" class="py-name" targets="Method metageta.progresslogger.ProgressLoggerHandler.close()=metageta.progresslogger.ProgressLoggerHandler-class.html#close"><a title="metageta.progresslogger.ProgressLoggerHandler.close" class="py-name" href="#" onclick="return doclink('link-15', 'close', 'link-15');">close</a></tt><tt class="py-op">(</tt><tt class="py-name">vrt</tt><tt class="py-op">)</tt> </tt>
<a name="L115"></a><tt class="py-lineno">115</tt>  <tt class="py-line">        <tt class="py-keyword">del</tt> <tt class="py-name">tempvrts</tt><tt class="py-op">[</tt><tt class="py-name">vrt</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">]</tt> </tt>
<a name="L116"></a><tt class="py-lineno">116</tt>  <tt class="py-line">        <tt class="py-name">os</tt><tt class="py-op">.</tt><tt class="py-name">unlink</tt><tt class="py-op">(</tt><tt class="py-name">tempvrts</tt><tt class="py-op">[</tt><tt class="py-name">vrt</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L117"></a><tt class="py-lineno">117</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">outfile</tt> </tt>
</div><a name="L118"></a><tt class="py-lineno">118</tt>  <tt class="py-line"><tt class="py-comment">#========================================================================================================</tt> </tt>
<a name="L119"></a><tt class="py-lineno">119</tt>  <tt class="py-line"><tt class="py-comment">#Stretch algorithms</tt> </tt>
<a name="L120"></a><tt class="py-lineno">120</tt>  <tt class="py-line"><tt class="py-comment">#========================================================================================================</tt> </tt>
<a name="stretch"></a><div id="stretch-def"><a name="L121"></a><tt class="py-lineno">121</tt> <a class="py-toggle" href="#" id="stretch-toggle" onclick="return toggle('stretch');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#stretch">stretch</a><tt class="py-op">(</tt><tt class="py-param">stretchType</tt><tt class="py-op">,</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-op">*</tt><tt class="py-param">args</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="stretch-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="stretch-expanded"><a name="L122"></a><tt class="py-lineno">122</tt>  <tt class="py-line">    <tt class="py-docstring">'''Calls the requested stretch function.</tt> </tt>
<a name="L123"></a><tt class="py-lineno">123</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L124"></a><tt class="py-lineno">124</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L125"></a><tt class="py-lineno">125</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L126"></a><tt class="py-lineno">126</tt>  <tt class="py-line"><tt class="py-docstring">        @type stretchType:  C{str}</tt> </tt>
<a name="L127"></a><tt class="py-lineno">127</tt>  <tt class="py-line"><tt class="py-docstring">        @param stretchType: One of COLORTABLE, COLORTABLELUT, COLOURTABLE, COLOURTABLELUT,</tt> </tt>
<a name="L128"></a><tt class="py-lineno">128</tt>  <tt class="py-line"><tt class="py-docstring">                                   MINMAX, NONE, PERCENT, RANDOM, STDDEV, UNIQUE</tt> </tt>
<a name="L129"></a><tt class="py-lineno">129</tt>  <tt class="py-line"><tt class="py-docstring">        @type vrtcols:      C{int}</tt> </tt>
<a name="L130"></a><tt class="py-lineno">130</tt>  <tt class="py-line"><tt class="py-docstring">        @param vrtcols:     The number of columns in the output VRT</tt> </tt>
<a name="L131"></a><tt class="py-lineno">131</tt>  <tt class="py-line"><tt class="py-docstring">        @type vrtrows:      C{int}</tt> </tt>
<a name="L132"></a><tt class="py-lineno">132</tt>  <tt class="py-line"><tt class="py-docstring">        @param vrtrows:     The number of rows in the output VRT</tt> </tt>
<a name="L133"></a><tt class="py-lineno">133</tt>  <tt class="py-line"><tt class="py-docstring">        @param args:        Other args</tt> </tt>
<a name="L134"></a><tt class="py-lineno">134</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:             C{xml}</tt> </tt>
<a name="L135"></a><tt class="py-lineno">135</tt>  <tt class="py-line"><tt class="py-docstring">        @return:            VRT XML string</tt> </tt>
<a name="L136"></a><tt class="py-lineno">136</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L137"></a><tt class="py-lineno">137</tt>  <tt class="py-line">    <tt id="link-16" class="py-name"><a title="metageta.overviews.stretch" class="py-name" href="#" onclick="return doclink('link-16', 'stretch', 'link-7');">stretch</a></tt><tt class="py-op">=</tt><tt class="py-name">globals</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">[</tt><tt class="py-string">'_stretch_'</tt><tt class="py-op">+</tt><tt class="py-name">stretchType</tt><tt class="py-op">.</tt><tt class="py-name">upper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">]</tt> </tt>
<a name="L138"></a><tt class="py-lineno">138</tt>  <tt class="py-line">    <tt class="py-name">vrt</tt><tt class="py-op">=</tt><tt id="link-17" class="py-name"><a title="metageta.overviews.stretch" class="py-name" href="#" onclick="return doclink('link-17', 'stretch', 'link-7');">stretch</a></tt><tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">,</tt><tt class="py-op">*</tt><tt class="py-name">args</tt><tt class="py-op">)</tt> </tt>
<a name="L139"></a><tt class="py-lineno">139</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt id="link-18" class="py-name"><a title="metageta.geometry" class="py-name" href="#" onclick="return doclink('link-18', 'geometry', 'link-1');">geometry</a></tt><tt class="py-op">.</tt><tt id="link-19" class="py-name" targets="Function metageta.geometry.CreateCustomVRT()=metageta.geometry-module.html#CreateCustomVRT"><a title="metageta.geometry.CreateCustomVRT" class="py-name" href="#" onclick="return doclink('link-19', 'CreateCustomVRT', 'link-19');">CreateCustomVRT</a></tt><tt class="py-op">(</tt><tt class="py-name">vrt</tt><tt class="py-op">,</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">)</tt> </tt>
</div><a name="L140"></a><tt class="py-lineno">140</tt>  <tt class="py-line"> </tt>
<a name="_stretch_NONE"></a><div id="_stretch_NONE-def"><a name="L141"></a><tt class="py-lineno">141</tt> <a class="py-toggle" href="#" id="_stretch_NONE-toggle" onclick="return toggle('_stretch_NONE');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#_stretch_NONE">_stretch_NONE</a><tt class="py-op">(</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_stretch_NONE-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_stretch_NONE-expanded"><a name="L142"></a><tt class="py-lineno">142</tt>  <tt class="py-line">    <tt class="py-docstring">''' No stretch.</tt> </tt>
<a name="L143"></a><tt class="py-lineno">143</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L144"></a><tt class="py-lineno">144</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L145"></a><tt class="py-lineno">145</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L146"></a><tt class="py-lineno">146</tt>  <tt class="py-line"><tt class="py-docstring">        @type ds:     C{gdal.Dataset}</tt> </tt>
<a name="L147"></a><tt class="py-lineno">147</tt>  <tt class="py-line"><tt class="py-docstring">        @param ds:    A gdal dataset object</tt> </tt>
<a name="L148"></a><tt class="py-lineno">148</tt>  <tt class="py-line"><tt class="py-docstring">        @type bands:  C{[int,...,int]}</tt> </tt>
<a name="L149"></a><tt class="py-lineno">149</tt>  <tt class="py-line"><tt class="py-docstring">        @param bands: A list of band numbers to output (in output order). E.g [4,2,1]</tt> </tt>
<a name="L150"></a><tt class="py-lineno">150</tt>  <tt class="py-line"><tt class="py-docstring">                      Band numbers are not zero indexed.</tt> </tt>
<a name="L151"></a><tt class="py-lineno">151</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:       C{xml}</tt> </tt>
<a name="L152"></a><tt class="py-lineno">152</tt>  <tt class="py-line"><tt class="py-docstring">        @return:      VRT XML string</tt> </tt>
<a name="L153"></a><tt class="py-lineno">153</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L154"></a><tt class="py-lineno">154</tt>  <tt class="py-line">    <tt class="py-name">vrt</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L155"></a><tt class="py-lineno">155</tt>  <tt class="py-line">    <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L156"></a><tt class="py-lineno">156</tt>  <tt class="py-line">    <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L157"></a><tt class="py-lineno">157</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">DataType</tt> <tt class="py-op">==</tt> <tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">GDT_Byte</tt><tt class="py-op">:</tt> </tt>
<a name="L158"></a><tt class="py-lineno">158</tt>  <tt class="py-line">        <tt class="py-name">rescale</tt><tt class="py-op">=</tt><tt class="py-name">False</tt> </tt>
<a name="L159"></a><tt class="py-lineno">159</tt>  <tt class="py-line">    <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L160"></a><tt class="py-lineno">160</tt>  <tt class="py-line">        <tt class="py-name">rescale</tt><tt class="py-op">=</tt><tt class="py-name">True</tt> </tt>
<a name="L161"></a><tt class="py-lineno">161</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt><tt id="link-20" class="py-name" targets="Function metageta.overviews.GetDataTypeRange()=metageta.overviews-module.html#GetDataTypeRange"><a title="metageta.overviews.GetDataTypeRange" class="py-name" href="#" onclick="return doclink('link-20', 'GetDataTypeRange', 'link-20');">GetDataTypeRange</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">DataType</tt><tt class="py-op">)</tt> </tt>
<a name="L162"></a><tt class="py-lineno">162</tt>  <tt class="py-line">        <tt class="py-name">dfRatio</tt><tt class="py-op">,</tt><tt class="py-name">dfOffset</tt> <tt class="py-op">=</tt> <tt id="link-21" class="py-name" targets="Function metageta.overviews.GetScaleRatioOffset()=metageta.overviews-module.html#GetScaleRatioOffset"><a title="metageta.overviews.GetScaleRatioOffset" class="py-name" href="#" onclick="return doclink('link-21', 'GetScaleRatioOffset', 'link-21');">GetScaleRatioOffset</a></tt><tt class="py-op">(</tt><tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt> </tt>
<a name="L163"></a><tt class="py-lineno">163</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">bandnum</tt><tt class="py-op">,</tt> <tt class="py-name">band</tt> <tt class="py-keyword">in</tt> <tt class="py-name">enumerate</tt><tt class="py-op">(</tt><tt class="py-name">bands</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L164"></a><tt class="py-lineno">164</tt>  <tt class="py-line">        <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L165"></a><tt class="py-lineno">165</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;VRTRasterBand dataType="Byte" band="%s"&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">bandnum</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L166"></a><tt class="py-lineno">166</tt>  <tt class="py-line">        <tt class="py-comment">#if nodata is not None:vrt.append('    &lt;NoDataValue&gt;%s&lt;/NoDataValue&gt;'%nodata)</tt> </tt>
<a name="L167"></a><tt class="py-lineno">167</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">rescale</tt><tt class="py-op">:</tt> </tt>
<a name="L168"></a><tt class="py-lineno">168</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L169"></a><tt class="py-lineno">169</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceFilename relativeToVRT="0"&gt;%s&lt;/SourceFilename&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDescription</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L170"></a><tt class="py-lineno">170</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceBand&gt;%s&lt;/SourceBand&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L171"></a><tt class="py-lineno">171</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SrcRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterXSize</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterYSize</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L172"></a><tt class="py-lineno">172</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;DstRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L173"></a><tt class="py-lineno">173</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;ScaleOffset&gt;%s&lt;/ScaleOffset&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">dfOffset</tt><tt class="py-op">)</tt> </tt>
<a name="L174"></a><tt class="py-lineno">174</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;ScaleRatio&gt;%s&lt;/ScaleRatio&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">dfRatio</tt><tt class="py-op">)</tt> </tt>
<a name="L175"></a><tt class="py-lineno">175</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;/ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L176"></a><tt class="py-lineno">176</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L177"></a><tt class="py-lineno">177</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;SimpleSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L178"></a><tt class="py-lineno">178</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceFilename relativeToVRT="0"&gt;%s&lt;/SourceFilename&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDescription</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L179"></a><tt class="py-lineno">179</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceBand&gt;%s&lt;/SourceBand&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L180"></a><tt class="py-lineno">180</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SrcRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterXSize</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterYSize</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L181"></a><tt class="py-lineno">181</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;DstRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L182"></a><tt class="py-lineno">182</tt>  <tt class="py-line">            <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;/SimpleSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L183"></a><tt class="py-lineno">183</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;/VRTRasterBand&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L184"></a><tt class="py-lineno">184</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-string">'\n'</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">vrt</tt><tt class="py-op">)</tt> </tt>
</div><a name="L185"></a><tt class="py-lineno">185</tt>  <tt class="py-line"> </tt>
<a name="_stretch_PERCENT"></a><div id="_stretch_PERCENT-def"><a name="L186"></a><tt class="py-lineno">186</tt> <a class="py-toggle" href="#" id="_stretch_PERCENT-toggle" onclick="return toggle('_stretch_PERCENT');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#_stretch_PERCENT">_stretch_PERCENT</a><tt class="py-op">(</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">,</tt><tt class="py-param">low</tt><tt class="py-op">,</tt><tt class="py-param">high</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_stretch_PERCENT-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_stretch_PERCENT-expanded"><a name="L187"></a><tt class="py-lineno">187</tt>  <tt class="py-line">    <tt class="py-docstring">''' Min, max percentage stretch.</tt> </tt>
<a name="L188"></a><tt class="py-lineno">188</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L189"></a><tt class="py-lineno">189</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L190"></a><tt class="py-lineno">190</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L191"></a><tt class="py-lineno">191</tt>  <tt class="py-line"><tt class="py-docstring">        @type ds:     C{gdal.Dataset}</tt> </tt>
<a name="L192"></a><tt class="py-lineno">192</tt>  <tt class="py-line"><tt class="py-docstring">        @param ds:    A gdal dataset object</tt> </tt>
<a name="L193"></a><tt class="py-lineno">193</tt>  <tt class="py-line"><tt class="py-docstring">        @type bands:  C{[int,...,int]}</tt> </tt>
<a name="L194"></a><tt class="py-lineno">194</tt>  <tt class="py-line"><tt class="py-docstring">        @param bands: A list of band numbers to output (in output order). E.g [4,2,1]</tt> </tt>
<a name="L195"></a><tt class="py-lineno">195</tt>  <tt class="py-line"><tt class="py-docstring">                      Band numbers are not zero indexed.</tt> </tt>
<a name="L196"></a><tt class="py-lineno">196</tt>  <tt class="py-line"><tt class="py-docstring">        @type low:    C{float}</tt> </tt>
<a name="L197"></a><tt class="py-lineno">197</tt>  <tt class="py-line"><tt class="py-docstring">        @param low:   Minimum percentage</tt> </tt>
<a name="L198"></a><tt class="py-lineno">198</tt>  <tt class="py-line"><tt class="py-docstring">        @type high:   C{float}</tt> </tt>
<a name="L199"></a><tt class="py-lineno">199</tt>  <tt class="py-line"><tt class="py-docstring">        @param high:  Maximum percentage</tt> </tt>
<a name="L200"></a><tt class="py-lineno">200</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:       C{xml}</tt> </tt>
<a name="L201"></a><tt class="py-lineno">201</tt>  <tt class="py-line"><tt class="py-docstring">        @return:      VRT XML string</tt> </tt>
<a name="L202"></a><tt class="py-lineno">202</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L203"></a><tt class="py-lineno">203</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">low</tt> <tt class="py-op">&gt;=</tt><tt class="py-number">1</tt><tt class="py-op">:</tt> </tt>
<a name="L204"></a><tt class="py-lineno">204</tt>  <tt class="py-line">        <tt class="py-name">low</tt><tt class="py-op">=</tt><tt class="py-name">low</tt><tt class="py-op">/</tt><tt class="py-number">100.0</tt> </tt>
<a name="L205"></a><tt class="py-lineno">205</tt>  <tt class="py-line">        <tt class="py-name">high</tt><tt class="py-op">=</tt><tt class="py-name">high</tt><tt class="py-op">/</tt><tt class="py-number">100.0</tt> </tt>
<a name="L206"></a><tt class="py-lineno">206</tt>  <tt class="py-line">    <tt class="py-name">vrt</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L207"></a><tt class="py-lineno">207</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">bandnum</tt><tt class="py-op">,</tt> <tt class="py-name">band</tt> <tt class="py-keyword">in</tt> <tt class="py-name">enumerate</tt><tt class="py-op">(</tt><tt class="py-name">bands</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L208"></a><tt class="py-lineno">208</tt>  <tt class="py-line">        <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L209"></a><tt class="py-lineno">209</tt>  <tt class="py-line">        <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L210"></a><tt class="py-lineno">210</tt>  <tt class="py-line">        <tt class="py-name">nbits</tt><tt class="py-op">=</tt><tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">GetDataTypeSize</tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">DataType</tt><tt class="py-op">)</tt> </tt>
<a name="L211"></a><tt class="py-lineno">211</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt><tt id="link-22" class="py-name"><a title="metageta.overviews.GetDataTypeRange" class="py-name" href="#" onclick="return doclink('link-22', 'GetDataTypeRange', 'link-20');">GetDataTypeRange</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">DataType</tt><tt class="py-op">)</tt> </tt>
<a name="L212"></a><tt class="py-lineno">212</tt>  <tt class="py-line">        <tt class="py-keyword">try</tt><tt class="py-op">:</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMean</tt><tt class="py-op">,</tt><tt class="py-name">dfBandStdDev</tt> <tt class="py-op">=</tt> <tt id="link-23" class="py-name" targets="Function metageta.overviews.GetStatistics()=metageta.overviews-module.html#GetStatistics"><a title="metageta.overviews.GetStatistics" class="py-name" href="#" onclick="return doclink('link-23', 'GetStatistics', 'link-23');">GetStatistics</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L213"></a><tt class="py-lineno">213</tt>  <tt class="py-line">        <tt class="py-keyword">except</tt><tt class="py-op">:</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMean</tt><tt class="py-op">,</tt><tt class="py-name">dfBandStdDev</tt> <tt class="py-op">=</tt> <tt id="link-24" class="py-name"><a title="metageta.overviews.GetStatistics" class="py-name" href="#" onclick="return doclink('link-24', 'GetStatistics', 'link-23');">GetStatistics</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L214"></a><tt class="py-lineno">214</tt>  <tt class="py-line">        <tt class="py-name">dfBandRange</tt><tt class="py-op">=</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">-</tt><tt class="py-name">dfBandMin</tt> </tt>
<a name="L215"></a><tt class="py-lineno">215</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">nbits</tt> <tt class="py-op">==</tt> <tt class="py-number">8</tt> <tt class="py-keyword">or</tt> <tt class="py-name">dfBandRange</tt><tt class="py-op">&lt;=</tt><tt class="py-number">255</tt><tt class="py-op">:</tt> </tt>
<a name="L216"></a><tt class="py-lineno">216</tt>  <tt class="py-line">            <tt class="py-name">nbins</tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">math</tt><tt class="py-op">.</tt><tt class="py-name">ceil</tt><tt class="py-op">(</tt><tt class="py-name">dfBandRange</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L217"></a><tt class="py-lineno">217</tt>  <tt class="py-line">            <tt class="py-name">binsize</tt><tt class="py-op">=</tt><tt class="py-number">1</tt> </tt>
<a name="L218"></a><tt class="py-lineno">218</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L219"></a><tt class="py-lineno">219</tt>  <tt class="py-line">            <tt class="py-name">nbins</tt><tt class="py-op">=</tt><tt class="py-number">256</tt> </tt>
<a name="L220"></a><tt class="py-lineno">220</tt>  <tt class="py-line">            <tt class="py-name">binsize</tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">math</tt><tt class="py-op">.</tt><tt class="py-name">ceil</tt><tt class="py-op">(</tt><tt class="py-op">(</tt><tt class="py-name">dfBandRange</tt><tt class="py-op">)</tt><tt class="py-op">/</tt><tt class="py-name">nbins</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L221"></a><tt class="py-lineno">221</tt>  <tt class="py-line"> </tt>
<a name="L222"></a><tt class="py-lineno">222</tt>  <tt class="py-line">        <tt class="py-comment">#hs=rb.GetHistogram(dfBandMin+abs(dfBandMin)*0.0001,dfBandMax-abs(dfBandMax)*0.0001, nbins,include_out_of_range=1,approx_ok=0)</tt> </tt>
<a name="L223"></a><tt class="py-lineno">223</tt>  <tt class="py-line">        <tt class="py-comment">#hs=rb.GetHistogram(dfBandMin+abs(dfBandMin)*0.0001,dfBandMax-abs(dfBandMax)*0.0001, nbins,include_out_of_range=1,approx_ok=1)</tt> </tt>
<a name="L224"></a><tt class="py-lineno">224</tt>  <tt class="py-line">        <tt class="py-name">hs</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetHistogram</tt><tt class="py-op">(</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">+</tt><tt class="py-name">abs</tt><tt class="py-op">(</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-number">0.0001</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">-</tt><tt class="py-name">abs</tt><tt class="py-op">(</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-number">0.0001</tt><tt class="py-op">,</tt> <tt class="py-name">nbins</tt><tt class="py-op">,</tt><tt class="py-name">include_out_of_range</tt><tt class="py-op">=</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-name">approx_ok</tt><tt class="py-op">=</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L225"></a><tt class="py-lineno">225</tt>  <tt class="py-line">        <tt class="py-comment">#Check that outliers haven't really skewed the histogram</tt> </tt>
<a name="L226"></a><tt class="py-lineno">226</tt>  <tt class="py-line">        <tt class="py-comment">#this is a kludge to workaround datasets with multiple nodata values</tt> </tt>
<a name="L227"></a><tt class="py-lineno">227</tt>  <tt class="py-line"><tt class="py-comment">##        for j in range(0,10):</tt> </tt>
<a name="L228"></a><tt class="py-lineno">228</tt>  <tt class="py-line"><tt class="py-comment">##            if len([v for v in hs if v &gt; 0]) &lt; nbins/4: #if only 25% of the bins have values...</tt> </tt>
<a name="L229"></a><tt class="py-lineno">229</tt>  <tt class="py-line"><tt class="py-comment">##                startbin=256</tt> </tt>
<a name="L230"></a><tt class="py-lineno">230</tt>  <tt class="py-line"><tt class="py-comment">##                lastbin=0</tt> </tt>
<a name="L231"></a><tt class="py-lineno">231</tt>  <tt class="py-line"><tt class="py-comment">##                for i,bin in enumerate(hs):</tt> </tt>
<a name="L232"></a><tt class="py-lineno">232</tt>  <tt class="py-line"><tt class="py-comment">##                    if bin &gt; 0:</tt> </tt>
<a name="L233"></a><tt class="py-lineno">233</tt>  <tt class="py-line"><tt class="py-comment">##                        lastbin=i</tt> </tt>
<a name="L234"></a><tt class="py-lineno">234</tt>  <tt class="py-line"><tt class="py-comment">##                        if i&lt;startbin:startbin=i</tt> </tt>
<a name="L235"></a><tt class="py-lineno">235</tt>  <tt class="py-line"><tt class="py-comment">##                dfBandMin=dfBandMin+startbin*binsize</tt> </tt>
<a name="L236"></a><tt class="py-lineno">236</tt>  <tt class="py-line"><tt class="py-comment">##                dfBandMax=dfBandMin+lastbin*binsize+binsize</tt> </tt>
<a name="L237"></a><tt class="py-lineno">237</tt>  <tt class="py-line"><tt class="py-comment">##                #hs=rb.GetHistogram(dfBandMin-abs(dfBandMin)*0.0001,dfBandMax+abs(dfBandMax)*0.0001,include_out_of_range=1,approx_ok=0)</tt> </tt>
<a name="L238"></a><tt class="py-lineno">238</tt>  <tt class="py-line"><tt class="py-comment">##                hs=rb.GetHistogram(dfBandMin-abs(dfBandMin)*0.0001,dfBandMax+abs(dfBandMax)*0.0001,include_out_of_range=1,approx_ok=1)</tt> </tt>
<a name="L239"></a><tt class="py-lineno">239</tt>  <tt class="py-line"><tt class="py-comment">##                if nbits == 8:binsize=1</tt> </tt>
<a name="L240"></a><tt class="py-lineno">240</tt>  <tt class="py-line"><tt class="py-comment">##                else:binsize=(dfBandRange)/nbins</tt> </tt>
<a name="L241"></a><tt class="py-lineno">241</tt>  <tt class="py-line"><tt class="py-comment">##            else:break</tt> </tt>
<a name="L242"></a><tt class="py-lineno">242</tt>  <tt class="py-line">        <tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
<a name="L243"></a><tt class="py-lineno">243</tt>  <tt class="py-line">            <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">=</tt><tt class="py-name">max</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt> <tt id="link-25" class="py-name" targets="Function metageta.overviews.HistPercentileValue()=metageta.overviews-module.html#HistPercentileValue"><a title="metageta.overviews.HistPercentileValue" class="py-name" href="#" onclick="return doclink('link-25', 'HistPercentileValue', 'link-25');">HistPercentileValue</a></tt><tt class="py-op">(</tt><tt class="py-name">hs</tt><tt class="py-op">,</tt> <tt class="py-name">low</tt><tt class="py-op">,</tt> <tt class="py-name">binsize</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">)</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L244"></a><tt class="py-lineno">244</tt>  <tt class="py-line">            <tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt><tt class="py-name">min</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">,</tt> <tt id="link-26" class="py-name"><a title="metageta.overviews.HistPercentileValue" class="py-name" href="#" onclick="return doclink('link-26', 'HistPercentileValue', 'link-25');">HistPercentileValue</a></tt><tt class="py-op">(</tt><tt class="py-name">hs</tt><tt class="py-op">,</tt> <tt class="py-name">high</tt><tt class="py-op">,</tt> <tt class="py-name">binsize</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">)</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L245"></a><tt class="py-lineno">245</tt>  <tt class="py-line">            <tt class="py-name">dfScaleDstMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleDstMax</tt><tt class="py-op">=</tt><tt class="py-number">0.0</tt><tt class="py-op">,</tt><tt class="py-number">255.0</tt> <tt class="py-comment">#Always going to be Byte for output jpegs</tt> </tt>
<a name="L246"></a><tt class="py-lineno">246</tt>  <tt class="py-line">            <tt class="py-name">dfScale</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">dfScaleDstMax</tt> <tt class="py-op">-</tt> <tt class="py-name">dfScaleDstMin</tt><tt class="py-op">)</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">dfScaleSrcMax</tt> <tt class="py-op">-</tt> <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">)</tt> </tt>
<a name="L247"></a><tt class="py-lineno">247</tt>  <tt class="py-line">            <tt class="py-name">dfOffset</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1</tt> <tt class="py-op">*</tt> <tt class="py-name">dfScaleSrcMin</tt> <tt class="py-op">*</tt> <tt class="py-name">dfScale</tt> <tt class="py-op">+</tt> <tt class="py-name">dfScaleDstMin</tt> </tt>
<a name="L248"></a><tt class="py-lineno">248</tt>  <tt class="py-line">        <tt class="py-keyword">except</tt><tt class="py-op">:</tt> </tt>
<a name="L249"></a><tt class="py-lineno">249</tt>  <tt class="py-line">            <tt class="py-name">dfOffset</tt><tt class="py-op">=</tt><tt class="py-number">0</tt> </tt>
<a name="L250"></a><tt class="py-lineno">250</tt>  <tt class="py-line">            <tt class="py-name">dfScale</tt><tt class="py-op">=</tt><tt class="py-number">1</tt> </tt>
<a name="L251"></a><tt class="py-lineno">251</tt>  <tt class="py-line"> </tt>
<a name="L252"></a><tt class="py-lineno">252</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;VRTRasterBand dataType="Byte" band="%s"&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">bandnum</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L253"></a><tt class="py-lineno">253</tt>  <tt class="py-line">        <tt class="py-comment">#if nodata is not None:vrt.append('    &lt;NoDataValue&gt;%s&lt;/NoDataValue&gt;'%nodata)</tt> </tt>
<a name="L254"></a><tt class="py-lineno">254</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L255"></a><tt class="py-lineno">255</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceFilename relativeToVRT="0"&gt;%s&lt;/SourceFilename&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDescription</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L256"></a><tt class="py-lineno">256</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceBand&gt;%s&lt;/SourceBand&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L257"></a><tt class="py-lineno">257</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SrcRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterXSize</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterYSize</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L258"></a><tt class="py-lineno">258</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;DstRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L259"></a><tt class="py-lineno">259</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;ScaleOffset&gt;%s&lt;/ScaleOffset&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">dfOffset</tt><tt class="py-op">)</tt> </tt>
<a name="L260"></a><tt class="py-lineno">260</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;ScaleRatio&gt;%s&lt;/ScaleRatio&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">dfScale</tt><tt class="py-op">)</tt> </tt>
<a name="L261"></a><tt class="py-lineno">261</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;/ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L262"></a><tt class="py-lineno">262</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;/VRTRasterBand&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L263"></a><tt class="py-lineno">263</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-string">'\n'</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">vrt</tt><tt class="py-op">)</tt> </tt>
</div><a name="L264"></a><tt class="py-lineno">264</tt>  <tt class="py-line"> </tt>
<a name="_stretch_MINMAX"></a><div id="_stretch_MINMAX-def"><a name="L265"></a><tt class="py-lineno">265</tt> <a class="py-toggle" href="#" id="_stretch_MINMAX-toggle" onclick="return toggle('_stretch_MINMAX');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#_stretch_MINMAX">_stretch_MINMAX</a><tt class="py-op">(</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_stretch_MINMAX-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_stretch_MINMAX-expanded"><a name="L266"></a><tt class="py-lineno">266</tt>  <tt class="py-line">    <tt class="py-docstring">''' Minimum-maximum stretch.</tt> </tt>
<a name="L267"></a><tt class="py-lineno">267</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L268"></a><tt class="py-lineno">268</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L269"></a><tt class="py-lineno">269</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L270"></a><tt class="py-lineno">270</tt>  <tt class="py-line"><tt class="py-docstring">        @type ds:     C{gdal.Dataset}</tt> </tt>
<a name="L271"></a><tt class="py-lineno">271</tt>  <tt class="py-line"><tt class="py-docstring">        @param ds:    A gdal dataset object</tt> </tt>
<a name="L272"></a><tt class="py-lineno">272</tt>  <tt class="py-line"><tt class="py-docstring">        @type bands:  C{[int,...,int]}</tt> </tt>
<a name="L273"></a><tt class="py-lineno">273</tt>  <tt class="py-line"><tt class="py-docstring">        @param bands: A list of band numbers to output (in output order). E.g [4,2,1]</tt> </tt>
<a name="L274"></a><tt class="py-lineno">274</tt>  <tt class="py-line"><tt class="py-docstring">                      Band numbers are not zero indexed.</tt> </tt>
<a name="L275"></a><tt class="py-lineno">275</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:       C{xml}</tt> </tt>
<a name="L276"></a><tt class="py-lineno">276</tt>  <tt class="py-line"><tt class="py-docstring">        @return:      VRT XML string</tt> </tt>
<a name="L277"></a><tt class="py-lineno">277</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L278"></a><tt class="py-lineno">278</tt>  <tt class="py-line">    <tt class="py-name">vrt</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L279"></a><tt class="py-lineno">279</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">bandnum</tt><tt class="py-op">,</tt> <tt class="py-name">band</tt> <tt class="py-keyword">in</tt> <tt class="py-name">enumerate</tt><tt class="py-op">(</tt><tt class="py-name">bands</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L280"></a><tt class="py-lineno">280</tt>  <tt class="py-line">        <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L281"></a><tt class="py-lineno">281</tt>  <tt class="py-line">        <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L282"></a><tt class="py-lineno">282</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt><tt id="link-27" class="py-name"><a title="metageta.overviews.GetDataTypeRange" class="py-name" href="#" onclick="return doclink('link-27', 'GetDataTypeRange', 'link-20');">GetDataTypeRange</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">DataType</tt><tt class="py-op">)</tt> </tt>
<a name="L283"></a><tt class="py-lineno">283</tt>  <tt class="py-line">        <tt class="py-keyword">try</tt><tt class="py-op">:</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMean</tt><tt class="py-op">,</tt><tt class="py-name">dfBandStdDev</tt> <tt class="py-op">=</tt> <tt id="link-28" class="py-name"><a title="metageta.overviews.GetStatistics" class="py-name" href="#" onclick="return doclink('link-28', 'GetStatistics', 'link-23');">GetStatistics</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L284"></a><tt class="py-lineno">284</tt>  <tt class="py-line">        <tt class="py-keyword">except</tt><tt class="py-op">:</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMean</tt><tt class="py-op">,</tt><tt class="py-name">dfBandStdDev</tt> <tt class="py-op">=</tt> <tt id="link-29" class="py-name"><a title="metageta.overviews.GetStatistics" class="py-name" href="#" onclick="return doclink('link-29', 'GetStatistics', 'link-23');">GetStatistics</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L285"></a><tt class="py-lineno">285</tt>  <tt class="py-line">        <tt class="py-name">dfScaleDstMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleDstMax</tt><tt class="py-op">=</tt><tt class="py-number">0.0</tt><tt class="py-op">,</tt><tt class="py-number">255.0</tt> <tt class="py-comment">#Always going to be Byte for output jpegs</tt> </tt>
<a name="L286"></a><tt class="py-lineno">286</tt>  <tt class="py-line">        <tt class="py-name">dfScale</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">dfScaleDstMax</tt> <tt class="py-op">-</tt> <tt class="py-name">dfScaleDstMin</tt><tt class="py-op">)</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">dfScaleSrcMax</tt> <tt class="py-op">-</tt> <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">)</tt> </tt>
<a name="L287"></a><tt class="py-lineno">287</tt>  <tt class="py-line">        <tt class="py-name">dfOffset</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1</tt> <tt class="py-op">*</tt> <tt class="py-name">dfScaleSrcMin</tt> <tt class="py-op">*</tt> <tt class="py-name">dfScale</tt> <tt class="py-op">+</tt> <tt class="py-name">dfScaleDstMin</tt> </tt>
<a name="L288"></a><tt class="py-lineno">288</tt>  <tt class="py-line"> </tt>
<a name="L289"></a><tt class="py-lineno">289</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;VRTRasterBand dataType="Byte" band="%s"&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">bandnum</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L290"></a><tt class="py-lineno">290</tt>  <tt class="py-line">        <tt class="py-comment">#if nodata is not None:vrt.append('    &lt;NoDataValue&gt;%s&lt;/NoDataValue&gt;'%nodata)</tt> </tt>
<a name="L291"></a><tt class="py-lineno">291</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L292"></a><tt class="py-lineno">292</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceFilename relativeToVRT="0"&gt;%s&lt;/SourceFilename&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDescription</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L293"></a><tt class="py-lineno">293</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceBand&gt;%s&lt;/SourceBand&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L294"></a><tt class="py-lineno">294</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SrcRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterXSize</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterYSize</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L295"></a><tt class="py-lineno">295</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;DstRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L296"></a><tt class="py-lineno">296</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;ScaleOffset&gt;%s&lt;/ScaleOffset&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">dfOffset</tt><tt class="py-op">)</tt> </tt>
<a name="L297"></a><tt class="py-lineno">297</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;ScaleRatio&gt;%s&lt;/ScaleRatio&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">dfScale</tt><tt class="py-op">)</tt> </tt>
<a name="L298"></a><tt class="py-lineno">298</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;/ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L299"></a><tt class="py-lineno">299</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;/VRTRasterBand&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L300"></a><tt class="py-lineno">300</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-string">'\n'</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">vrt</tt><tt class="py-op">)</tt> </tt>
</div><a name="L301"></a><tt class="py-lineno">301</tt>  <tt class="py-line"> </tt>
<a name="_stretch_STDDEV"></a><div id="_stretch_STDDEV-def"><a name="L302"></a><tt class="py-lineno">302</tt> <a class="py-toggle" href="#" id="_stretch_STDDEV-toggle" onclick="return toggle('_stretch_STDDEV');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#_stretch_STDDEV">_stretch_STDDEV</a><tt class="py-op">(</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">,</tt><tt class="py-param">std</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_stretch_STDDEV-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_stretch_STDDEV-expanded"><a name="L303"></a><tt class="py-lineno">303</tt>  <tt class="py-line">    <tt class="py-docstring">''' Standard deviation stretch.</tt> </tt>
<a name="L304"></a><tt class="py-lineno">304</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L305"></a><tt class="py-lineno">305</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L306"></a><tt class="py-lineno">306</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L307"></a><tt class="py-lineno">307</tt>  <tt class="py-line"><tt class="py-docstring">        @type ds:     C{gdal.Dataset}</tt> </tt>
<a name="L308"></a><tt class="py-lineno">308</tt>  <tt class="py-line"><tt class="py-docstring">        @param ds:    A gdal dataset object</tt> </tt>
<a name="L309"></a><tt class="py-lineno">309</tt>  <tt class="py-line"><tt class="py-docstring">        @type bands:  C{[int,...,int]}</tt> </tt>
<a name="L310"></a><tt class="py-lineno">310</tt>  <tt class="py-line"><tt class="py-docstring">        @param bands: A list of band numbers to output (in output order). E.g [4,2,1]</tt> </tt>
<a name="L311"></a><tt class="py-lineno">311</tt>  <tt class="py-line"><tt class="py-docstring">                      Band numbers are not zero indexed.</tt> </tt>
<a name="L312"></a><tt class="py-lineno">312</tt>  <tt class="py-line"><tt class="py-docstring">        @type std:    float</tt> </tt>
<a name="L313"></a><tt class="py-lineno">313</tt>  <tt class="py-line"><tt class="py-docstring">        @param std:   Standard deviation</tt> </tt>
<a name="L314"></a><tt class="py-lineno">314</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:       C{xml}</tt> </tt>
<a name="L315"></a><tt class="py-lineno">315</tt>  <tt class="py-line"><tt class="py-docstring">        @return:      VRT XML string</tt> </tt>
<a name="L316"></a><tt class="py-lineno">316</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L317"></a><tt class="py-lineno">317</tt>  <tt class="py-line">    <tt class="py-name">vrt</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L318"></a><tt class="py-lineno">318</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">bandnum</tt><tt class="py-op">,</tt> <tt class="py-name">band</tt> <tt class="py-keyword">in</tt> <tt class="py-name">enumerate</tt><tt class="py-op">(</tt><tt class="py-name">bands</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L319"></a><tt class="py-lineno">319</tt>  <tt class="py-line">        <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L320"></a><tt class="py-lineno">320</tt>  <tt class="py-line">        <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L321"></a><tt class="py-lineno">321</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt><tt id="link-30" class="py-name"><a title="metageta.overviews.GetDataTypeRange" class="py-name" href="#" onclick="return doclink('link-30', 'GetDataTypeRange', 'link-20');">GetDataTypeRange</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">DataType</tt><tt class="py-op">)</tt> </tt>
<a name="L322"></a><tt class="py-lineno">322</tt>  <tt class="py-line">        <tt class="py-keyword">try</tt><tt class="py-op">:</tt> <tt class="py-name">dfBandMin</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMean</tt><tt class="py-op">,</tt><tt class="py-name">dfBandStdDev</tt> <tt class="py-op">=</tt> <tt id="link-31" class="py-name"><a title="metageta.overviews.GetStatistics" class="py-name" href="#" onclick="return doclink('link-31', 'GetStatistics', 'link-23');">GetStatistics</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L323"></a><tt class="py-lineno">323</tt>  <tt class="py-line">        <tt class="py-keyword">except</tt><tt class="py-op">:</tt><tt class="py-name">dfBandMin</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMax</tt><tt class="py-op">,</tt><tt class="py-name">dfBandMean</tt><tt class="py-op">,</tt><tt class="py-name">dfBandStdDev</tt> <tt class="py-op">=</tt> <tt id="link-32" class="py-name"><a title="metageta.overviews.GetStatistics" class="py-name" href="#" onclick="return doclink('link-32', 'GetStatistics', 'link-23');">GetStatistics</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L324"></a><tt class="py-lineno">324</tt>  <tt class="py-line">        <tt class="py-name">dfScaleDstMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleDstMax</tt><tt class="py-op">=</tt><tt class="py-number">0.0</tt><tt class="py-op">,</tt><tt class="py-number">255.0</tt> <tt class="py-comment">#Always going to be Byte for output jpegs</tt> </tt>
<a name="L325"></a><tt class="py-lineno">325</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">=</tt><tt class="py-name">max</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt> <tt class="py-name">math</tt><tt class="py-op">.</tt><tt class="py-name">floor</tt><tt class="py-op">(</tt><tt class="py-name">dfBandMean</tt><tt class="py-op">-</tt><tt class="py-name">std</tt><tt class="py-op">*</tt><tt class="py-name">dfBandStdDev</tt><tt class="py-op">)</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L326"></a><tt class="py-lineno">326</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt><tt class="py-name">min</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">,</tt> <tt class="py-name">math</tt><tt class="py-op">.</tt><tt class="py-name">ceil</tt><tt class="py-op">(</tt><tt class="py-name">dfBandMean</tt><tt class="py-op">+</tt><tt class="py-name">std</tt><tt class="py-op">*</tt><tt class="py-name">dfBandStdDev</tt><tt class="py-op">)</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L327"></a><tt class="py-lineno">327</tt>  <tt class="py-line"> </tt>
<a name="L328"></a><tt class="py-lineno">328</tt>  <tt class="py-line">        <tt class="py-keyword">try</tt><tt class="py-op">:</tt><tt class="py-name">dfScale</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">dfScaleDstMax</tt> <tt class="py-op">-</tt> <tt class="py-name">dfScaleDstMin</tt><tt class="py-op">)</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">dfScaleSrcMax</tt> <tt class="py-op">-</tt> <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">)</tt> </tt>
<a name="L329"></a><tt class="py-lineno">329</tt>  <tt class="py-line">        <tt class="py-keyword">except</tt> <tt class="py-name">ZeroDivisionError</tt><tt class="py-op">:</tt><tt class="py-keyword">return</tt> <tt id="link-33" class="py-name" targets="Function metageta.overviews._stretch_RANDOM()=metageta.overviews-module.html#_stretch_RANDOM"><a title="metageta.overviews._stretch_RANDOM" class="py-name" href="#" onclick="return doclink('link-33', '_stretch_RANDOM', 'link-33');">_stretch_RANDOM</a></tt><tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">,</tt><tt class="py-name">bands</tt><tt class="py-op">)</tt> </tt>
<a name="L330"></a><tt class="py-lineno">330</tt>  <tt class="py-line"> </tt>
<a name="L331"></a><tt class="py-lineno">331</tt>  <tt class="py-line">        <tt class="py-name">dfOffset</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1</tt> <tt class="py-op">*</tt> <tt class="py-name">dfScaleSrcMin</tt> <tt class="py-op">*</tt> <tt class="py-name">dfScale</tt> <tt class="py-op">+</tt> <tt class="py-name">dfScaleDstMin</tt> </tt>
<a name="L332"></a><tt class="py-lineno">332</tt>  <tt class="py-line"> </tt>
<a name="L333"></a><tt class="py-lineno">333</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;VRTRasterBand dataType="Byte" band="%s"&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">bandnum</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L334"></a><tt class="py-lineno">334</tt>  <tt class="py-line">        <tt class="py-comment">#if nodata is not None:vrt.append('    &lt;NoDataValue&gt;%s&lt;/NoDataValue&gt;'%nodata)</tt> </tt>
<a name="L335"></a><tt class="py-lineno">335</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L336"></a><tt class="py-lineno">336</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceFilename relativeToVRT="0"&gt;%s&lt;/SourceFilename&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDescription</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L337"></a><tt class="py-lineno">337</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceBand&gt;%s&lt;/SourceBand&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L338"></a><tt class="py-lineno">338</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SrcRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterXSize</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterYSize</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L339"></a><tt class="py-lineno">339</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;DstRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L340"></a><tt class="py-lineno">340</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;ScaleOffset&gt;%s&lt;/ScaleOffset&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">dfOffset</tt><tt class="py-op">)</tt> </tt>
<a name="L341"></a><tt class="py-lineno">341</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;ScaleRatio&gt;%s&lt;/ScaleRatio&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">dfScale</tt><tt class="py-op">)</tt> </tt>
<a name="L342"></a><tt class="py-lineno">342</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;/ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L343"></a><tt class="py-lineno">343</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;/VRTRasterBand&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L344"></a><tt class="py-lineno">344</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-string">'\n'</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">vrt</tt><tt class="py-op">)</tt> </tt>
</div><a name="L345"></a><tt class="py-lineno">345</tt>  <tt class="py-line"> </tt>
<a name="_stretch_UNIQUE"></a><div id="_stretch_UNIQUE-def"><a name="L346"></a><tt class="py-lineno">346</tt> <a class="py-toggle" href="#" id="_stretch_UNIQUE-toggle" onclick="return toggle('_stretch_UNIQUE');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#_stretch_UNIQUE">_stretch_UNIQUE</a><tt class="py-op">(</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">,</tt><tt class="py-param">vals</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_stretch_UNIQUE-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_stretch_UNIQUE-expanded"><a name="L347"></a><tt class="py-lineno">347</tt>  <tt class="py-line">    <tt class="py-docstring">''' Unique values stretch.</tt> </tt>
<a name="L348"></a><tt class="py-lineno">348</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L349"></a><tt class="py-lineno">349</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L350"></a><tt class="py-lineno">350</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L351"></a><tt class="py-lineno">351</tt>  <tt class="py-line"><tt class="py-docstring">        @type ds:      C{gdal.Dataset}</tt> </tt>
<a name="L352"></a><tt class="py-lineno">352</tt>  <tt class="py-line"><tt class="py-docstring">        @param ds:     A gdal dataset object</tt> </tt>
<a name="L353"></a><tt class="py-lineno">353</tt>  <tt class="py-line"><tt class="py-docstring">        @type bands:   C{[int]}</tt> </tt>
<a name="L354"></a><tt class="py-lineno">354</tt>  <tt class="py-line"><tt class="py-docstring">        @param bands:  Band number to output. Band numbers are not zero indexed.</tt> </tt>
<a name="L355"></a><tt class="py-lineno">355</tt>  <tt class="py-line"><tt class="py-docstring">        @type vals:    C{list/tuple}</tt> </tt>
<a name="L356"></a><tt class="py-lineno">356</tt>  <tt class="py-line"><tt class="py-docstring">        @param vals:   List of cell values and R,G,B[,A] values e.g [(12, 0,0,0), (25, 255,255,255)]</tt> </tt>
<a name="L357"></a><tt class="py-lineno">357</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:        C{xml}</tt> </tt>
<a name="L358"></a><tt class="py-lineno">358</tt>  <tt class="py-line"><tt class="py-docstring">        @return:       VRT XML string</tt> </tt>
<a name="L359"></a><tt class="py-lineno">359</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L360"></a><tt class="py-lineno">360</tt>  <tt class="py-line">    <tt class="py-name">band</tt><tt class="py-op">=</tt><tt class="py-name">bands</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L361"></a><tt class="py-lineno">361</tt>  <tt class="py-line">    <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L362"></a><tt class="py-lineno">362</tt>  <tt class="py-line">    <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L363"></a><tt class="py-lineno">363</tt>  <tt class="py-line">    <tt class="py-name">vrt</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L364"></a><tt class="py-lineno">364</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">iclr</tt><tt class="py-op">,</tt><tt class="py-name">clr</tt> <tt class="py-keyword">in</tt> <tt class="py-name">enumerate</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-string">'Red'</tt><tt class="py-op">,</tt><tt class="py-string">'Green'</tt><tt class="py-op">,</tt><tt class="py-string">'Blue'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L365"></a><tt class="py-lineno">365</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;VRTRasterBand dataType="Byte" band="%s"&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">iclr</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L366"></a><tt class="py-lineno">366</tt>  <tt class="py-line">        <tt class="py-comment">#if nodata is not None:vrt.append('    &lt;NoDataValue&gt;%s&lt;/NoDataValue&gt;'%nodata)</tt> </tt>
<a name="L367"></a><tt class="py-lineno">367</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;ColorInterp&gt;%s&lt;/ColorInterp&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">clr</tt><tt class="py-op">)</tt> </tt>
<a name="L368"></a><tt class="py-lineno">368</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L369"></a><tt class="py-lineno">369</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceFilename relativeToVRT="0"&gt;%s&lt;/SourceFilename&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDescription</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L370"></a><tt class="py-lineno">370</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceBand&gt;%s&lt;/SourceBand&gt;'</tt><tt class="py-op">%</tt><tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L371"></a><tt class="py-lineno">371</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SrcRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterXSize</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterYSize</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L372"></a><tt class="py-lineno">372</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;DstRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L373"></a><tt class="py-lineno">373</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;LUT&gt;%s&lt;/LUT&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-string">','</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-string">'%s:%s'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">v</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">,</tt> <tt class="py-name">v</tt><tt class="py-op">[</tt><tt class="py-name">iclr</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> <tt class="py-keyword">for</tt> <tt class="py-name">v</tt> <tt class="py-keyword">in</tt> <tt class="py-name">vals</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L374"></a><tt class="py-lineno">374</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;/ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L375"></a><tt class="py-lineno">375</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;/VRTRasterBand&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L376"></a><tt class="py-lineno">376</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-string">'\n'</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">vrt</tt><tt class="py-op">)</tt> </tt>
</div><a name="L377"></a><tt class="py-lineno">377</tt>  <tt class="py-line"> </tt>
<a name="_stretch_RANDOM"></a><div id="_stretch_RANDOM-def"><a name="L378"></a><tt class="py-lineno">378</tt> <a class="py-toggle" href="#" id="_stretch_RANDOM-toggle" onclick="return toggle('_stretch_RANDOM');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#_stretch_RANDOM">_stretch_RANDOM</a><tt class="py-op">(</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_stretch_RANDOM-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_stretch_RANDOM-expanded"><a name="L379"></a><tt class="py-lineno">379</tt>  <tt class="py-line">    <tt class="py-docstring">''' Random values stretch.</tt> </tt>
<a name="L380"></a><tt class="py-lineno">380</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L381"></a><tt class="py-lineno">381</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L382"></a><tt class="py-lineno">382</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L383"></a><tt class="py-lineno">383</tt>  <tt class="py-line"><tt class="py-docstring">        @type ds:      C{gdal.Dataset}</tt> </tt>
<a name="L384"></a><tt class="py-lineno">384</tt>  <tt class="py-line"><tt class="py-docstring">        @param ds:     A gdal dataset object</tt> </tt>
<a name="L385"></a><tt class="py-lineno">385</tt>  <tt class="py-line"><tt class="py-docstring">        @type bands:   C{[int]}</tt> </tt>
<a name="L386"></a><tt class="py-lineno">386</tt>  <tt class="py-line"><tt class="py-docstring">        @param bands:  Band number to output. Band numbers are not zero indexed.</tt> </tt>
<a name="L387"></a><tt class="py-lineno">387</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:        C{xml}</tt> </tt>
<a name="L388"></a><tt class="py-lineno">388</tt>  <tt class="py-line"><tt class="py-docstring">        @return:       VRT XML string</tt> </tt>
<a name="L389"></a><tt class="py-lineno">389</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L390"></a><tt class="py-lineno">390</tt>  <tt class="py-line"><tt class="py-docstring">        @change: 22/01/2010 lpinner fix for U{r2&lt;http://code.google.com/p/metageta/issues/detail?id=2&amp;can=1&gt;}</tt> </tt>
<a name="L391"></a><tt class="py-lineno">391</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L392"></a><tt class="py-lineno">392</tt>  <tt class="py-line">    <tt class="py-keyword">from</tt> <tt class="py-name">random</tt> <tt class="py-keyword">import</tt> <tt class="py-name">randint</tt> <tt class="py-keyword">as</tt> <tt id="link-34" class="py-name" targets="Variable metageta.formats.r=metageta.formats-module.html#r"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-34', 'r', 'link-34');">r</a></tt> </tt>
<a name="L393"></a><tt class="py-lineno">393</tt>  <tt class="py-line"> </tt>
<a name="L394"></a><tt class="py-lineno">394</tt>  <tt class="py-line">    <tt class="py-name">band</tt><tt class="py-op">=</tt><tt class="py-name">bands</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L395"></a><tt class="py-lineno">395</tt>  <tt class="py-line">    <tt class="py-name">vals</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L396"></a><tt class="py-lineno">396</tt>  <tt class="py-line"> </tt>
<a name="L397"></a><tt class="py-lineno">397</tt>  <tt class="py-line">    <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-name">bands</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L398"></a><tt class="py-lineno">398</tt>  <tt class="py-line">    <tt class="py-name">min</tt><tt class="py-op">,</tt><tt class="py-name">max</tt><tt class="py-op">=</tt><tt class="py-name">map</tt><tt class="py-op">(</tt><tt class="py-name">int</tt><tt class="py-op">,</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">ComputeRasterMinMax</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L399"></a><tt class="py-lineno">399</tt>  <tt class="py-line"> </tt>
<a name="L400"></a><tt class="py-lineno">400</tt>  <tt class="py-line">    <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> <tt class="py-comment">#Is this kludge required if we include &lt;NoDataValue&gt; in the VRT...?</tt> </tt>
<a name="L401"></a><tt class="py-lineno">401</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">nodata</tt> <tt class="py-keyword">is</tt> <tt class="py-keyword">not</tt> <tt class="py-name">None</tt><tt class="py-op">:</tt> </tt>
<a name="L402"></a><tt class="py-lineno">402</tt>  <tt class="py-line">        <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">nodata</tt><tt class="py-op">)</tt> </tt>
<a name="L403"></a><tt class="py-lineno">403</tt>  <tt class="py-line">        <tt class="py-name">nodatavals</tt><tt class="py-op">=</tt><tt class="py-op">(</tt><tt class="py-name">nodata</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">)</tt> </tt>
<a name="L404"></a><tt class="py-lineno">404</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">min</tt><tt class="py-op">&gt;</tt><tt class="py-name">nodata</tt><tt class="py-op">:</tt><tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">nodatavals</tt><tt class="py-op">)</tt> </tt>
<a name="L405"></a><tt class="py-lineno">405</tt>  <tt class="py-line"> </tt>
<a name="L406"></a><tt class="py-lineno">406</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">i</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">min</tt><tt class="py-op">,</tt><tt class="py-name">max</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">:</tt><tt class="py-comment">#build random RGBA tuple</tt> </tt>
<a name="L407"></a><tt class="py-lineno">407</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">nodata</tt> <tt class="py-keyword">is</tt> <tt class="py-keyword">not</tt> <tt class="py-name">None</tt><tt class="py-op">:</tt> </tt>
<a name="L408"></a><tt class="py-lineno">408</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">i</tt> <tt class="py-op">!=</tt> <tt class="py-name">nodata</tt><tt class="py-op">:</tt><tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-op">(</tt><tt class="py-name">i</tt><tt class="py-op">,</tt><tt id="link-35" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-35', 'r', 'link-34');">r</a></tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt id="link-36" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-36', 'r', 'link-34');">r</a></tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt id="link-37" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-37', 'r', 'link-34');">r</a></tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L409"></a><tt class="py-lineno">409</tt>  <tt class="py-line">            <tt class="py-keyword">else</tt><tt class="py-op">:</tt><tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">nodatavals</tt><tt class="py-op">)</tt> </tt>
<a name="L410"></a><tt class="py-lineno">410</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt><tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-op">(</tt><tt class="py-name">i</tt><tt class="py-op">,</tt><tt id="link-38" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-38', 'r', 'link-34');">r</a></tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt id="link-39" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-39', 'r', 'link-34');">r</a></tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt id="link-40" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-40', 'r', 'link-34');">r</a></tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L411"></a><tt class="py-lineno">411</tt>  <tt class="py-line"> </tt>
<a name="L412"></a><tt class="py-lineno">412</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">nodata</tt> <tt class="py-keyword">is</tt> <tt class="py-keyword">not</tt> <tt class="py-name">None</tt> <tt class="py-keyword">and</tt> <tt class="py-name">nodata</tt> <tt class="py-op">&gt;</tt> <tt class="py-name">max</tt><tt class="py-op">:</tt> </tt>
<a name="L413"></a><tt class="py-lineno">413</tt>  <tt class="py-line">        <tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">nodatavals</tt><tt class="py-op">)</tt> </tt>
<a name="L414"></a><tt class="py-lineno">414</tt>  <tt class="py-line"> </tt>
<a name="L415"></a><tt class="py-lineno">415</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt id="link-41" class="py-name" targets="Function metageta.overviews._stretch_UNIQUE()=metageta.overviews-module.html#_stretch_UNIQUE"><a title="metageta.overviews._stretch_UNIQUE" class="py-name" href="#" onclick="return doclink('link-41', '_stretch_UNIQUE', 'link-41');">_stretch_UNIQUE</a></tt><tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">,</tt><tt class="py-name">bands</tt><tt class="py-op">,</tt><tt class="py-name">vals</tt><tt class="py-op">)</tt> </tt>
</div><a name="L416"></a><tt class="py-lineno">416</tt>  <tt class="py-line"> </tt>
<a name="_stretch_COLOURTABLE"></a><div id="_stretch_COLOURTABLE-def"><a name="L417"></a><tt class="py-lineno">417</tt> <a class="py-toggle" href="#" id="_stretch_COLOURTABLE-toggle" onclick="return toggle('_stretch_COLOURTABLE');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#_stretch_COLOURTABLE">_stretch_COLOURTABLE</a><tt class="py-op">(</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_stretch_COLOURTABLE-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_stretch_COLOURTABLE-expanded"><a name="L418"></a><tt class="py-lineno">418</tt>  <tt class="py-line">    <tt class="py-docstring">''' Colour table stretch.</tt> </tt>
<a name="L419"></a><tt class="py-lineno">419</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L420"></a><tt class="py-lineno">420</tt>  <tt class="py-line"><tt class="py-docstring">        This is a workaround for GDAL not liking color tables with negative or missing values.</tt> </tt>
<a name="L421"></a><tt class="py-lineno">421</tt>  <tt class="py-line"><tt class="py-docstring">        U{r3253&lt;http://trac.osgeo.org/gdal/ticket/3253&gt;}</tt> </tt>
<a name="L422"></a><tt class="py-lineno">422</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L423"></a><tt class="py-lineno">423</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L424"></a><tt class="py-lineno">424</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L425"></a><tt class="py-lineno">425</tt>  <tt class="py-line"><tt class="py-docstring">        @type ds:      C{gdal.Dataset}</tt> </tt>
<a name="L426"></a><tt class="py-lineno">426</tt>  <tt class="py-line"><tt class="py-docstring">        @param ds:     A gdal dataset object</tt> </tt>
<a name="L427"></a><tt class="py-lineno">427</tt>  <tt class="py-line"><tt class="py-docstring">        @type bands:   C{[int]}</tt> </tt>
<a name="L428"></a><tt class="py-lineno">428</tt>  <tt class="py-line"><tt class="py-docstring">        @param bands:  Band number to output. Band numbers are not zero indexed.</tt> </tt>
<a name="L429"></a><tt class="py-lineno">429</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:        C{xml}</tt> </tt>
<a name="L430"></a><tt class="py-lineno">430</tt>  <tt class="py-line"><tt class="py-docstring">        @return:       VRT XML string</tt> </tt>
<a name="L431"></a><tt class="py-lineno">431</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L432"></a><tt class="py-lineno">432</tt>  <tt class="py-line">    <tt class="py-name">band</tt><tt class="py-op">=</tt><tt class="py-name">bands</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L433"></a><tt class="py-lineno">433</tt>  <tt class="py-line">    <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L434"></a><tt class="py-lineno">434</tt>  <tt class="py-line">    <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L435"></a><tt class="py-lineno">435</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">nodata</tt> <tt class="py-keyword">is</tt> <tt class="py-keyword">not</tt> <tt class="py-name">None</tt><tt class="py-op">:</tt><tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">nodata</tt><tt class="py-op">)</tt> </tt>
<a name="L436"></a><tt class="py-lineno">436</tt>  <tt class="py-line">    <tt class="py-name">ct</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetColorTable</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L437"></a><tt class="py-lineno">437</tt>  <tt class="py-line">    <tt class="py-name">min</tt><tt class="py-op">,</tt><tt class="py-name">max</tt><tt class="py-op">=</tt><tt class="py-name">map</tt><tt class="py-op">(</tt><tt class="py-name">int</tt><tt class="py-op">,</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">ComputeRasterMinMax</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L438"></a><tt class="py-lineno">438</tt>  <tt class="py-line">    <tt class="py-comment">#rat=rb.GetHistogram(min, max, abs(min)+abs(max)+1,include_out_of_range=1,approx_ok=0)</tt> </tt>
<a name="L439"></a><tt class="py-lineno">439</tt>  <tt class="py-line">    <tt class="py-name">rat</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetHistogram</tt><tt class="py-op">(</tt><tt class="py-name">min</tt><tt class="py-op">,</tt> <tt class="py-name">max</tt><tt class="py-op">,</tt> <tt class="py-name">abs</tt><tt class="py-op">(</tt><tt class="py-name">min</tt><tt class="py-op">)</tt><tt class="py-op">+</tt><tt class="py-name">abs</tt><tt class="py-op">(</tt><tt class="py-name">max</tt><tt class="py-op">)</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-name">include_out_of_range</tt><tt class="py-op">=</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-name">approx_ok</tt><tt class="py-op">=</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L440"></a><tt class="py-lineno">440</tt>  <tt class="py-line">    <tt class="py-name">vals</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L441"></a><tt class="py-lineno">441</tt>  <tt class="py-line">    <tt class="py-name">ct_count</tt><tt class="py-op">=</tt><tt class="py-name">ct</tt><tt class="py-op">.</tt><tt class="py-name">GetCount</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L442"></a><tt class="py-lineno">442</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">val</tt><tt class="py-op">,</tt><tt class="py-name">count</tt> <tt class="py-keyword">in</tt> <tt class="py-name">zip</tt><tt class="py-op">(</tt><tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">min</tt><tt class="py-op">,</tt><tt class="py-name">max</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-name">rat</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L443"></a><tt class="py-lineno">443</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">val</tt> <tt class="py-op">!=</tt> <tt class="py-name">nodata</tt> <tt class="py-keyword">and</tt> <tt class="py-name">count</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0</tt> <tt class="py-keyword">and</tt> <tt class="py-name">val</tt> <tt class="py-op">&lt;</tt> <tt class="py-name">ct_count</tt><tt class="py-op">:</tt> <tt class="py-comment">#Bugfix - sometime there are more values than</tt> </tt>
<a name="L444"></a><tt class="py-lineno">444</tt>  <tt class="py-line">            <tt class="py-name">ce</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-name">val</tt><tt class="py-op">]</tt>                                       <tt class="py-comment">#colortable entries which causes gdal to segfault</tt> </tt>
<a name="L445"></a><tt class="py-lineno">445</tt>  <tt class="py-line">            <tt class="py-name">ce</tt><tt class="py-op">.</tt><tt class="py-name">extend</tt><tt class="py-op">(</tt><tt class="py-name">ct</tt><tt class="py-op">.</tt><tt class="py-name">GetColorEntry</tt><tt class="py-op">(</tt><tt class="py-name">val</tt><tt class="py-op">)</tt><tt class="py-op">)</tt>               <tt class="py-comment">#http://trac.osgeo.org/gdal/ticket/3271</tt> </tt>
<a name="L446"></a><tt class="py-lineno">446</tt>  <tt class="py-line">            <tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">ce</tt><tt class="py-op">)</tt> </tt>
<a name="L447"></a><tt class="py-lineno">447</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt><tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">val</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L448"></a><tt class="py-lineno">448</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt id="link-42" class="py-name"><a title="metageta.overviews._stretch_UNIQUE" class="py-name" href="#" onclick="return doclink('link-42', '_stretch_UNIQUE', 'link-41');">_stretch_UNIQUE</a></tt><tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">,</tt><tt class="py-name">bands</tt><tt class="py-op">,</tt><tt class="py-name">vals</tt><tt class="py-op">)</tt> </tt>
</div><a name="L449"></a><tt class="py-lineno">449</tt>  <tt class="py-line"><tt class="py-comment">##def _stretch_COLOURTABLE(vrtcols,vrtrows,ds,bands): #gdal doesn't handle esri colour tables with missing or negative values</tt> </tt>
<a name="L450"></a><tt class="py-lineno">450</tt>  <tt class="py-line"><tt class="py-comment">##    vrt=[]</tt> </tt>
<a name="L451"></a><tt class="py-lineno">451</tt>  <tt class="py-line"><tt class="py-comment">##    colours=['Red','Green','Blue']</tt> </tt>
<a name="L452"></a><tt class="py-lineno">452</tt>  <tt class="py-line"><tt class="py-comment">##    for index, colour in enumerate(colours):</tt> </tt>
<a name="L453"></a><tt class="py-lineno">453</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('  &lt;VRTRasterBand dataType="Byte" band="%s"&gt;' % str(index+1))</tt> </tt>
<a name="L454"></a><tt class="py-lineno">454</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('    &lt;ColorInterp&gt;%s&lt;/ColorInterp&gt;' % colour)</tt> </tt>
<a name="L455"></a><tt class="py-lineno">455</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('    &lt;ComplexSource&gt;')</tt> </tt>
<a name="L456"></a><tt class="py-lineno">456</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('      &lt;SourceFilename relativeToVRT="0"&gt;%s&lt;/SourceFilename&gt;' % ds.GetDescription())</tt> </tt>
<a name="L457"></a><tt class="py-lineno">457</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('      &lt;SourceBand&gt;%s&lt;/SourceBand&gt;' % bands[0])</tt> </tt>
<a name="L458"></a><tt class="py-lineno">458</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('      &lt;SrcRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;' % (ds.RasterXSize,ds.RasterYSize))</tt> </tt>
<a name="L459"></a><tt class="py-lineno">459</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('      &lt;DstRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;' % (vrtcols,vrtrows))</tt> </tt>
<a name="L460"></a><tt class="py-lineno">460</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('      &lt;ColorTableComponent&gt;%s&lt;/ColorTableComponent&gt;' % str(index+1))</tt> </tt>
<a name="L461"></a><tt class="py-lineno">461</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('    &lt;/ComplexSource&gt;')</tt> </tt>
<a name="L462"></a><tt class="py-lineno">462</tt>  <tt class="py-line"><tt class="py-comment">##        vrt.append('  &lt;/VRTRasterBand&gt;')</tt> </tt>
<a name="L463"></a><tt class="py-lineno">463</tt>  <tt class="py-line"><tt class="py-comment">##    return '\n'.join(vrt)</tt> </tt>
<a name="L464"></a><tt class="py-lineno">464</tt>  <tt class="py-line"><tt class="py-name">_stretch_COLORTABLE</tt><tt class="py-op">=</tt><tt id="link-43" class="py-name" targets="Function metageta.overviews._stretch_COLOURTABLE()=metageta.overviews-module.html#_stretch_COLOURTABLE"><a title="metageta.overviews._stretch_COLOURTABLE" class="py-name" href="#" onclick="return doclink('link-43', '_stretch_COLOURTABLE', 'link-43');">_stretch_COLOURTABLE</a></tt> <tt class="py-comment">#Synonym for the norteamericanos</tt> </tt>
<a name="L465"></a><tt class="py-lineno">465</tt>  <tt class="py-line"> </tt>
<a name="_stretch_COLOURTABLELUT"></a><div id="_stretch_COLOURTABLELUT-def"><a name="L466"></a><tt class="py-lineno">466</tt> <a class="py-toggle" href="#" id="_stretch_COLOURTABLELUT-toggle" onclick="return toggle('_stretch_COLOURTABLELUT');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#_stretch_COLOURTABLELUT">_stretch_COLOURTABLELUT</a><tt class="py-op">(</tt><tt class="py-param">vrtcols</tt><tt class="py-op">,</tt><tt class="py-param">vrtrows</tt><tt class="py-op">,</tt><tt class="py-param">ds</tt><tt class="py-op">,</tt><tt class="py-param">bands</tt><tt class="py-op">,</tt><tt class="py-param">clr</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="_stretch_COLOURTABLELUT-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="_stretch_COLOURTABLELUT-expanded"><a name="L467"></a><tt class="py-lineno">467</tt>  <tt class="py-line">    <tt class="py-docstring">''' Colour table file LUT stretch.</tt> </tt>
<a name="L468"></a><tt class="py-lineno">468</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L469"></a><tt class="py-lineno">469</tt>  <tt class="py-line"><tt class="py-docstring">        This is a workaround for GDAL not liking color tables with negative or missing values.</tt> </tt>
<a name="L470"></a><tt class="py-lineno">470</tt>  <tt class="py-line"><tt class="py-docstring">        U{r3253&lt;http://trac.osgeo.org/gdal/ticket/3253&gt;}</tt> </tt>
<a name="L471"></a><tt class="py-lineno">471</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L472"></a><tt class="py-lineno">472</tt>  <tt class="py-line"><tt class="py-docstring">        For further info on VRT's, see the U{GDAL VRT Tutorial&lt;http://www.gdal.org/gdal_vrttut.html&gt;}</tt> </tt>
<a name="L473"></a><tt class="py-lineno">473</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L474"></a><tt class="py-lineno">474</tt>  <tt class="py-line"><tt class="py-docstring">        @type ds:      C{gdal.Dataset}</tt> </tt>
<a name="L475"></a><tt class="py-lineno">475</tt>  <tt class="py-line"><tt class="py-docstring">        @param ds:     A gdal dataset object</tt> </tt>
<a name="L476"></a><tt class="py-lineno">476</tt>  <tt class="py-line"><tt class="py-docstring">        @type bands:   C{[int]}</tt> </tt>
<a name="L477"></a><tt class="py-lineno">477</tt>  <tt class="py-line"><tt class="py-docstring">        @param bands:  Band number to output. Band numbers are not zero indexed.</tt> </tt>
<a name="L478"></a><tt class="py-lineno">478</tt>  <tt class="py-line"><tt class="py-docstring">        @type clr:     C{str}</tt> </tt>
<a name="L479"></a><tt class="py-lineno">479</tt>  <tt class="py-line"><tt class="py-docstring">        @param clr:    Path to colour lookup file.</tt> </tt>
<a name="L480"></a><tt class="py-lineno">480</tt>  <tt class="py-line"><tt class="py-docstring">                       See file format in L{ParseColourLUT&lt;ParseColourLUT&gt;}</tt> </tt>
<a name="L481"></a><tt class="py-lineno">481</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:        C{xml}</tt> </tt>
<a name="L482"></a><tt class="py-lineno">482</tt>  <tt class="py-line"><tt class="py-docstring">        @return:       VRT XML string</tt> </tt>
<a name="L483"></a><tt class="py-lineno">483</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L484"></a><tt class="py-lineno">484</tt>  <tt class="py-line">    <tt class="py-name">vrt</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L485"></a><tt class="py-lineno">485</tt>  <tt class="py-line">    <tt class="py-name">band</tt><tt class="py-op">=</tt><tt class="py-name">bands</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L486"></a><tt class="py-lineno">486</tt>  <tt class="py-line">    <tt class="py-name">rb</tt><tt class="py-op">=</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetRasterBand</tt><tt class="py-op">(</tt><tt class="py-name">band</tt><tt class="py-op">)</tt> </tt>
<a name="L487"></a><tt class="py-lineno">487</tt>  <tt class="py-line">    <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L488"></a><tt class="py-lineno">488</tt>  <tt class="py-line">    <tt class="py-name">lut</tt><tt class="py-op">=</tt><tt id="link-44" class="py-name" targets="Function metageta.overviews.ColourLUT()=metageta.overviews-module.html#ColourLUT"><a title="metageta.overviews.ColourLUT" class="py-name" href="#" onclick="return doclink('link-44', 'ColourLUT', 'link-44');">ColourLUT</a></tt><tt class="py-op">(</tt><tt class="py-name">clr</tt><tt class="py-op">,</tt><tt class="py-name">rb</tt><tt class="py-op">)</tt> </tt>
<a name="L489"></a><tt class="py-lineno">489</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">iclr</tt><tt class="py-op">,</tt><tt class="py-name">clr</tt> <tt class="py-keyword">in</tt> <tt class="py-name">enumerate</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-string">'Red'</tt><tt class="py-op">,</tt><tt class="py-string">'Green'</tt><tt class="py-op">,</tt><tt class="py-string">'Blue'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L490"></a><tt class="py-lineno">490</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;VRTRasterBand dataType="Byte" band="%s"&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">iclr</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L491"></a><tt class="py-lineno">491</tt>  <tt class="py-line">        <tt class="py-comment">#if nodata is not None:vrt.append('    &lt;NoDataValue&gt;%s&lt;/NoDataValue&gt;'%nodata)</tt> </tt>
<a name="L492"></a><tt class="py-lineno">492</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;ColorInterp&gt;%s&lt;/ColorInterp&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">clr</tt><tt class="py-op">)</tt> </tt>
<a name="L493"></a><tt class="py-lineno">493</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L494"></a><tt class="py-lineno">494</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceFilename relativeToVRT="0"&gt;%s&lt;/SourceFilename&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">GetDescription</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L495"></a><tt class="py-lineno">495</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SourceBand&gt;1&lt;/SourceBand&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L496"></a><tt class="py-lineno">496</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;SrcRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterXSize</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterYSize</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L497"></a><tt class="py-lineno">497</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;DstRect xOff="0" yOff="0" xSize="%s" ySize="%s"/&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">vrtcols</tt><tt class="py-op">,</tt><tt class="py-name">vrtrows</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L498"></a><tt class="py-lineno">498</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'      &lt;LUT&gt;\n        %s\n      &lt;/LUT&gt;'</tt> <tt class="py-op">%</tt> <tt class="py-string">',\n        '</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-string">'%s:%s'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">v</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">,</tt> <tt class="py-name">v</tt><tt class="py-op">[</tt><tt class="py-name">iclr</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> <tt class="py-keyword">for</tt> <tt class="py-name">v</tt> <tt class="py-keyword">in</tt> <tt class="py-name">lut</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L499"></a><tt class="py-lineno">499</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'    &lt;/ComplexSource&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L500"></a><tt class="py-lineno">500</tt>  <tt class="py-line">        <tt class="py-name">vrt</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'  &lt;/VRTRasterBand&gt;'</tt><tt class="py-op">)</tt> </tt>
<a name="L501"></a><tt class="py-lineno">501</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-string">'\n'</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">vrt</tt><tt class="py-op">)</tt> </tt>
</div><a name="L502"></a><tt class="py-lineno">502</tt>  <tt class="py-line"><tt class="py-name">_stretch_COLORTABLELUT</tt><tt class="py-op">=</tt><tt id="link-45" class="py-name" targets="Function metageta.overviews._stretch_COLOURTABLELUT()=metageta.overviews-module.html#_stretch_COLOURTABLELUT"><a title="metageta.overviews._stretch_COLOURTABLELUT" class="py-name" href="#" onclick="return doclink('link-45', '_stretch_COLOURTABLELUT', 'link-45');">_stretch_COLOURTABLELUT</a></tt> <tt class="py-comment">#Synonym for the norteamericanos</tt> </tt>
<a name="L503"></a><tt class="py-lineno">503</tt>  <tt class="py-line"><tt class="py-comment">#========================================================================================================</tt> </tt>
<a name="L504"></a><tt class="py-lineno">504</tt>  <tt class="py-line"><tt class="py-comment">#Helper functions</tt> </tt>
<a name="L505"></a><tt class="py-lineno">505</tt>  <tt class="py-line"><tt class="py-comment">#========================================================================================================</tt> </tt>
<a name="GetStatistics"></a><div id="GetStatistics-def"><a name="L506"></a><tt class="py-lineno">506</tt> <a class="py-toggle" href="#" id="GetStatistics-toggle" onclick="return toggle('GetStatistics');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#GetStatistics">GetStatistics</a><tt class="py-op">(</tt><tt class="py-param">band</tt><tt class="py-op">,</tt><tt class="py-op">*</tt><tt class="py-param">args</tt><tt class="py-op">,</tt><tt class="py-op">**</tt><tt class="py-param">kwargs</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="GetStatistics-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="GetStatistics-expanded"><a name="L507"></a><tt class="py-lineno">507</tt>  <tt class="py-line">    <tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">UseExceptions</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L508"></a><tt class="py-lineno">508</tt>  <tt class="py-line">    <tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
<a name="L509"></a><tt class="py-lineno">509</tt>  <tt class="py-line">        <tt class="py-name">stats</tt><tt class="py-op">=</tt><tt class="py-name">band</tt><tt class="py-op">.</tt><tt id="link-46" class="py-name"><a title="metageta.overviews.GetStatistics" class="py-name" href="#" onclick="return doclink('link-46', 'GetStatistics', 'link-23');">GetStatistics</a></tt><tt class="py-op">(</tt><tt class="py-op">*</tt><tt class="py-name">args</tt><tt class="py-op">,</tt><tt class="py-op">**</tt><tt class="py-name">kwargs</tt><tt class="py-op">)</tt> </tt>
<a name="L510"></a><tt class="py-lineno">510</tt>  <tt class="py-line">    <tt class="py-keyword">except</tt><tt class="py-op">:</tt> </tt>
<a name="L511"></a><tt class="py-lineno">511</tt>  <tt class="py-line">        <tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">DontUseExceptions</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L512"></a><tt class="py-lineno">512</tt>  <tt class="py-line">        <tt class="py-keyword">raise</tt> <tt id="link-47" class="py-name"><a title="metageta.geometry" class="py-name" href="#" onclick="return doclink('link-47', 'geometry', 'link-1');">geometry</a></tt><tt class="py-op">.</tt><tt id="link-48" class="py-name"><a title="metageta.geometry.GDALError" class="py-name" href="#" onclick="return doclink('link-48', 'GDALError', 'link-11');">GDALError</a></tt> </tt>
<a name="L513"></a><tt class="py-lineno">513</tt>  <tt class="py-line">    <tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">DontUseExceptions</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L514"></a><tt class="py-lineno">514</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">stats</tt> </tt>
</div><a name="GetScaleRatioOffset"></a><div id="GetScaleRatioOffset-def"><a name="L515"></a><tt class="py-lineno">515</tt> <a class="py-toggle" href="#" id="GetScaleRatioOffset-toggle" onclick="return toggle('GetScaleRatioOffset');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#GetScaleRatioOffset">GetScaleRatioOffset</a><tt class="py-op">(</tt><tt class="py-param">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-param">dfScaleSrcMax</tt><tt class="py-op">,</tt><tt class="py-param">dfScaleDstMin</tt><tt class="py-op">,</tt><tt class="py-param">dfScaleDstMax</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="GetScaleRatioOffset-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="GetScaleRatioOffset-expanded"><a name="L516"></a><tt class="py-lineno">516</tt>  <tt class="py-line">    <tt class="py-docstring">''' Calculate data scale and offset</tt> </tt>
<a name="L517"></a><tt class="py-lineno">517</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L518"></a><tt class="py-lineno">518</tt>  <tt class="py-line"><tt class="py-docstring">        @type dfScaleSrcMin:   C{float}</tt> </tt>
<a name="L519"></a><tt class="py-lineno">519</tt>  <tt class="py-line"><tt class="py-docstring">        @param dfScaleSrcMin:  input minimum value</tt> </tt>
<a name="L520"></a><tt class="py-lineno">520</tt>  <tt class="py-line"><tt class="py-docstring">        @type dfScaleSrcMax:   C{float}</tt> </tt>
<a name="L521"></a><tt class="py-lineno">521</tt>  <tt class="py-line"><tt class="py-docstring">        @param dfScaleSrcMax:  input maximum value</tt> </tt>
<a name="L522"></a><tt class="py-lineno">522</tt>  <tt class="py-line"><tt class="py-docstring">        @type dfScaleDstMin:   C{float}</tt> </tt>
<a name="L523"></a><tt class="py-lineno">523</tt>  <tt class="py-line"><tt class="py-docstring">        @param dfScaleDstMin:  output minimum value</tt> </tt>
<a name="L524"></a><tt class="py-lineno">524</tt>  <tt class="py-line"><tt class="py-docstring">        @type dfScaleDstMax:   C{float}</tt> </tt>
<a name="L525"></a><tt class="py-lineno">525</tt>  <tt class="py-line"><tt class="py-docstring">        @param dfScaleDstMax:  output maximum value</tt> </tt>
<a name="L526"></a><tt class="py-lineno">526</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:           C{[float,float]}</tt> </tt>
<a name="L527"></a><tt class="py-lineno">527</tt>  <tt class="py-line"><tt class="py-docstring">        @return:          Scale and offset values</tt> </tt>
<a name="L528"></a><tt class="py-lineno">528</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L529"></a><tt class="py-lineno">529</tt>  <tt class="py-line">    <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleDstMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleDstMax</tt><tt class="py-op">=</tt><tt class="py-name">map</tt><tt class="py-op">(</tt><tt class="py-name">float</tt><tt class="py-op">,</tt> <tt class="py-op">[</tt><tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleDstMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleDstMax</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L530"></a><tt class="py-lineno">530</tt>  <tt class="py-line">    <tt class="py-name">dfScale</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">dfScaleDstMax</tt><tt class="py-op">)</tt> <tt class="py-op">-</tt> <tt class="py-name">dfScaleDstMin</tt><tt class="py-op">)</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">dfScaleSrcMax</tt> <tt class="py-op">-</tt> <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">)</tt> </tt>
<a name="L531"></a><tt class="py-lineno">531</tt>  <tt class="py-line">    <tt class="py-name">dfOffset</tt> <tt class="py-op">=</tt> <tt class="py-op">-</tt><tt class="py-number">1</tt> <tt class="py-op">*</tt> <tt class="py-name">dfScaleSrcMin</tt> <tt class="py-op">*</tt> <tt class="py-name">dfScale</tt> <tt class="py-op">+</tt> <tt class="py-name">dfScaleDstMin</tt> </tt>
<a name="L532"></a><tt class="py-lineno">532</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">dfScale</tt><tt class="py-op">,</tt><tt class="py-name">dfOffset</tt> </tt>
</div><a name="L533"></a><tt class="py-lineno">533</tt>  <tt class="py-line"> </tt>
<a name="GetDataTypeRange"></a><div id="GetDataTypeRange-def"><a name="L534"></a><tt class="py-lineno">534</tt> <a class="py-toggle" href="#" id="GetDataTypeRange-toggle" onclick="return toggle('GetDataTypeRange');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#GetDataTypeRange">GetDataTypeRange</a><tt class="py-op">(</tt><tt class="py-param">datatype</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="GetDataTypeRange-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="GetDataTypeRange-expanded"><a name="L535"></a><tt class="py-lineno">535</tt>  <tt class="py-line">    <tt class="py-docstring">''' Calculate data type range</tt> </tt>
<a name="L536"></a><tt class="py-lineno">536</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L537"></a><tt class="py-lineno">537</tt>  <tt class="py-line"><tt class="py-docstring">        @type datatype:   C{int}</tt> </tt>
<a name="L538"></a><tt class="py-lineno">538</tt>  <tt class="py-line"><tt class="py-docstring">        @param datatype:  gdal data type constant</tt> </tt>
<a name="L539"></a><tt class="py-lineno">539</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:           C{[int,int]}</tt> </tt>
<a name="L540"></a><tt class="py-lineno">540</tt>  <tt class="py-line"><tt class="py-docstring">        @return:          Min and max value for data type</tt> </tt>
<a name="L541"></a><tt class="py-lineno">541</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L542"></a><tt class="py-lineno">542</tt>  <tt class="py-line">    <tt class="py-name">nbits</tt>   <tt class="py-op">=</tt><tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">GetDataTypeSize</tt><tt class="py-op">(</tt><tt class="py-name">datatype</tt><tt class="py-op">)</tt> </tt>
<a name="L543"></a><tt class="py-lineno">543</tt>  <tt class="py-line">    <tt class="py-name">datatype</tt><tt class="py-op">=</tt><tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">GetDataTypeName</tt><tt class="py-op">(</tt><tt class="py-name">datatype</tt><tt class="py-op">)</tt> </tt>
<a name="L544"></a><tt class="py-lineno">544</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">datatype</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-number">4</tt><tt class="py-op">]</tt> <tt class="py-keyword">in</tt> <tt class="py-op">[</tt><tt class="py-string">'Byte'</tt><tt class="py-op">,</tt><tt class="py-string">'UInt'</tt><tt class="py-op">]</tt><tt class="py-op">:</tt> </tt>
<a name="L545"></a><tt class="py-lineno">545</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">=</tt><tt class="py-number">0</tt>             <tt class="py-comment">#Unsigned</tt> </tt>
<a name="L546"></a><tt class="py-lineno">546</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt><tt class="py-number">2</tt><tt class="py-op">**</tt><tt class="py-op">(</tt><tt class="py-name">nbits</tt><tt class="py-op">)</tt><tt class="py-op">-</tt><tt class="py-number">1</tt> </tt>
<a name="L547"></a><tt class="py-lineno">547</tt>  <tt class="py-line">    <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L548"></a><tt class="py-lineno">548</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">=</tt><tt class="py-op">-</tt><tt class="py-number">2</tt><tt class="py-op">**</tt><tt class="py-op">(</tt><tt class="py-name">nbits</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> <tt class="py-comment">#Signed</tt> </tt>
<a name="L549"></a><tt class="py-lineno">549</tt>  <tt class="py-line">        <tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt> <tt class="py-number">2</tt><tt class="py-op">**</tt><tt class="py-op">(</tt><tt class="py-name">nbits</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">-</tt><tt class="py-number">1</tt> </tt>
<a name="L550"></a><tt class="py-lineno">550</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-op">(</tt><tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">)</tt> </tt>
</div><a name="HistPercentileValue"></a><div id="HistPercentileValue-def"><a name="L551"></a><tt class="py-lineno">551</tt> <a class="py-toggle" href="#" id="HistPercentileValue-toggle" onclick="return toggle('HistPercentileValue');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#HistPercentileValue">HistPercentileValue</a><tt class="py-op">(</tt><tt class="py-param">inhist</tt><tt class="py-op">,</tt> <tt class="py-param">percent</tt><tt class="py-op">,</tt> <tt class="py-param">binsize</tt><tt class="py-op">,</tt> <tt class="py-param">lowerlimit</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="HistPercentileValue-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="HistPercentileValue-expanded"><a name="L552"></a><tt class="py-lineno">552</tt>  <tt class="py-line">    <tt class="py-docstring">''' Returns the score at a given percentile relative to the distribution given by inhist.</tt> </tt>
<a name="L553"></a><tt class="py-lineno">553</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L554"></a><tt class="py-lineno">554</tt>  <tt class="py-line"><tt class="py-docstring">        Usage:   histpercentilevalue(inhist, percent, binsize,lowerlimit)</tt> </tt>
<a name="L555"></a><tt class="py-lineno">555</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L556"></a><tt class="py-lineno">556</tt>  <tt class="py-line"><tt class="py-docstring">        @type inhist:       C{list}</tt> </tt>
<a name="L557"></a><tt class="py-lineno">557</tt>  <tt class="py-line"><tt class="py-docstring">        @param inhist:      gdal histogram</tt> </tt>
<a name="L558"></a><tt class="py-lineno">558</tt>  <tt class="py-line"><tt class="py-docstring">        @type percent:      C{float}</tt> </tt>
<a name="L559"></a><tt class="py-lineno">559</tt>  <tt class="py-line"><tt class="py-docstring">        @param percent:     percentile to return score for</tt> </tt>
<a name="L560"></a><tt class="py-lineno">560</tt>  <tt class="py-line"><tt class="py-docstring">        @type binsize:      C{float}</tt> </tt>
<a name="L561"></a><tt class="py-lineno">561</tt>  <tt class="py-line"><tt class="py-docstring">        @param binsize:     width of histogram bins</tt> </tt>
<a name="L562"></a><tt class="py-lineno">562</tt>  <tt class="py-line"><tt class="py-docstring">        @type lowerlimit:   C{float}</tt> </tt>
<a name="L563"></a><tt class="py-lineno">563</tt>  <tt class="py-line"><tt class="py-docstring">        @param lowerlimit:  min value of histogram</tt> </tt>
<a name="L564"></a><tt class="py-lineno">564</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:             C{float}</tt> </tt>
<a name="L565"></a><tt class="py-lineno">565</tt>  <tt class="py-line"><tt class="py-docstring">        @return:            score at a given percentile</tt> </tt>
<a name="L566"></a><tt class="py-lineno">566</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L567"></a><tt class="py-lineno">567</tt>  <tt class="py-line"> </tt>
<a name="L568"></a><tt class="py-lineno">568</tt>  <tt class="py-line">    <tt class="py-comment"># NOTE this function is from "python-statlib" - http://code.google.com/p/python-statlib/</tt> </tt>
<a name="L569"></a><tt class="py-lineno">569</tt>  <tt class="py-line">    <tt class="py-comment">#</tt> </tt>
<a name="L570"></a><tt class="py-lineno">570</tt>  <tt class="py-line">    <tt class="py-comment"># Copyright (c) 1999-2007 Gary Strangman; All Rights Reserved.</tt> </tt>
<a name="L571"></a><tt class="py-lineno">571</tt>  <tt class="py-line">    <tt class="py-comment">#</tt> </tt>
<a name="L572"></a><tt class="py-lineno">572</tt>  <tt class="py-line">    <tt class="py-comment"># Permission is hereby granted, free of charge, to any person obtaining a copy</tt> </tt>
<a name="L573"></a><tt class="py-lineno">573</tt>  <tt class="py-line">    <tt class="py-comment"># of this software and associated documentation files (the "Software"), to deal</tt> </tt>
<a name="L574"></a><tt class="py-lineno">574</tt>  <tt class="py-line">    <tt class="py-comment"># in the Software without restriction, including without limitation the rights</tt> </tt>
<a name="L575"></a><tt class="py-lineno">575</tt>  <tt class="py-line">    <tt class="py-comment"># to use, copy, modify, merge, publish, distribute, sublicense, and/or sell</tt> </tt>
<a name="L576"></a><tt class="py-lineno">576</tt>  <tt class="py-line">    <tt class="py-comment"># copies of the Software, and to permit persons to whom the Software is</tt> </tt>
<a name="L577"></a><tt class="py-lineno">577</tt>  <tt class="py-line">    <tt class="py-comment"># furnished to do so, subject to the following conditions:</tt> </tt>
<a name="L578"></a><tt class="py-lineno">578</tt>  <tt class="py-line">    <tt class="py-comment">#</tt> </tt>
<a name="L579"></a><tt class="py-lineno">579</tt>  <tt class="py-line">    <tt class="py-comment"># The above copyright notice and this permission notice shall be included in</tt> </tt>
<a name="L580"></a><tt class="py-lineno">580</tt>  <tt class="py-line">    <tt class="py-comment"># all copies or substantial portions of the Software.</tt> </tt>
<a name="L581"></a><tt class="py-lineno">581</tt>  <tt class="py-line">    <tt class="py-comment">#</tt> </tt>
<a name="L582"></a><tt class="py-lineno">582</tt>  <tt class="py-line">    <tt class="py-comment"># THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</tt> </tt>
<a name="L583"></a><tt class="py-lineno">583</tt>  <tt class="py-line">    <tt class="py-comment"># IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</tt> </tt>
<a name="L584"></a><tt class="py-lineno">584</tt>  <tt class="py-line">    <tt class="py-comment"># FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</tt> </tt>
<a name="L585"></a><tt class="py-lineno">585</tt>  <tt class="py-line">    <tt class="py-comment"># AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</tt> </tt>
<a name="L586"></a><tt class="py-lineno">586</tt>  <tt class="py-line">    <tt class="py-comment"># LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</tt> </tt>
<a name="L587"></a><tt class="py-lineno">587</tt>  <tt class="py-line">    <tt class="py-comment"># OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN</tt> </tt>
<a name="L588"></a><tt class="py-lineno">588</tt>  <tt class="py-line">    <tt class="py-comment"># THE SOFTWARE.</tt> </tt>
<a name="L589"></a><tt class="py-lineno">589</tt>  <tt class="py-line">    <tt class="py-comment">#</tt> </tt>
<a name="L590"></a><tt class="py-lineno">590</tt>  <tt class="py-line">    <tt class="py-comment"># Comments and/or additions are welcome (send e-mail to:</tt> </tt>
<a name="L591"></a><tt class="py-lineno">591</tt>  <tt class="py-line">    <tt class="py-comment"># strang@nmr.mgh.harvard.edu).</tt> </tt>
<a name="L592"></a><tt class="py-lineno">592</tt>  <tt class="py-line">    <tt class="py-comment">#</tt> </tt>
<a name="L593"></a><tt class="py-lineno">593</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">percent</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">1</tt><tt class="py-op">:</tt> </tt>
<a name="L594"></a><tt class="py-lineno">594</tt>  <tt class="py-line">        <tt class="py-name">percent</tt> <tt class="py-op">=</tt> <tt class="py-name">percent</tt> <tt class="py-op">/</tt> <tt class="py-number">100.0</tt> </tt>
<a name="L595"></a><tt class="py-lineno">595</tt>  <tt class="py-line">    <tt class="py-name">targetcf</tt> <tt class="py-op">=</tt> <tt class="py-name">percent</tt><tt class="py-op">*</tt><tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">inhist</tt><tt class="py-op">)</tt> </tt>
<a name="L596"></a><tt class="py-lineno">596</tt>  <tt class="py-line">    <tt class="py-name">total</tt><tt class="py-op">=</tt><tt class="py-name">sum</tt><tt class="py-op">(</tt><tt class="py-name">inhist</tt><tt class="py-op">)</tt> </tt>
<a name="L597"></a><tt class="py-lineno">597</tt>  <tt class="py-line">    <tt class="py-name">cumulsum</tt><tt class="py-op">=</tt><tt class="py-number">0.0</tt> </tt>
<a name="L598"></a><tt class="py-lineno">598</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">i</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">inhist</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L599"></a><tt class="py-lineno">599</tt>  <tt class="py-line">        <tt class="py-name">cumulsum</tt><tt class="py-op">+=</tt><tt class="py-name">inhist</tt><tt class="py-op">[</tt><tt class="py-name">i</tt><tt class="py-op">]</tt> </tt>
<a name="L600"></a><tt class="py-lineno">600</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">cumulsum</tt><tt class="py-op">/</tt><tt class="py-name">total</tt> <tt class="py-op">&gt;=</tt> <tt class="py-name">percent</tt><tt class="py-op">:</tt><tt class="py-keyword">break</tt> </tt>
<a name="L601"></a><tt class="py-lineno">601</tt>  <tt class="py-line">    <tt class="py-name">score</tt> <tt class="py-op">=</tt> <tt class="py-name">lowerlimit</tt><tt class="py-op">+</tt><tt class="py-name">binsize</tt><tt class="py-op">*</tt><tt class="py-name">i</tt><tt class="py-op">-</tt><tt class="py-name">binsize</tt> </tt>
<a name="L602"></a><tt class="py-lineno">602</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">score</tt> </tt>
</div><a name="L603"></a><tt class="py-lineno">603</tt>  <tt class="py-line"> </tt>
<a name="RATtoLUT"></a><div id="RATtoLUT-def"><a name="L604"></a><tt class="py-lineno">604</tt> <a class="py-toggle" href="#" id="RATtoLUT-toggle" onclick="return toggle('RATtoLUT');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#RATtoLUT">RATtoLUT</a><tt class="py-op">(</tt><tt class="py-param">rat</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="RATtoLUT-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="RATtoLUT-expanded"><a name="L605"></a><tt class="py-lineno">605</tt>  <tt class="py-line">    <tt class="py-docstring">''' Create a LUT from an attribute table with RGB columns</tt> </tt>
<a name="L606"></a><tt class="py-lineno">606</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L607"></a><tt class="py-lineno">607</tt>  <tt class="py-line"><tt class="py-docstring">        @type rat:   C{GDALRasterAttributeTable}</tt> </tt>
<a name="L608"></a><tt class="py-lineno">608</tt>  <tt class="py-line"><tt class="py-docstring">        @param rat:  A GDALRasterAttributeTable</tt> </tt>
<a name="L609"></a><tt class="py-lineno">609</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:      C{list}</tt> </tt>
<a name="L610"></a><tt class="py-lineno">610</tt>  <tt class="py-line"><tt class="py-docstring">        @return:     List of cell values and R,G,B,A values e.g ((12,0,0,0,255), (25,255,255,255,0))</tt> </tt>
<a name="L611"></a><tt class="py-lineno">611</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L612"></a><tt class="py-lineno">612</tt>  <tt class="py-line">    <tt class="py-name">rgbcols</tt><tt class="py-op">=</tt><tt class="py-op">{</tt><tt class="py-op">}</tt> </tt>
<a name="L613"></a><tt class="py-lineno">613</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">iCol</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-name">rat</tt><tt class="py-op">.</tt><tt class="py-name">GetColumnCount</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">:</tt><tt class="py-comment">#+1):</tt> </tt>
<a name="L614"></a><tt class="py-lineno">614</tt>  <tt class="py-line">        <tt class="py-name">sCol</tt><tt class="py-op">=</tt><tt class="py-name">rat</tt><tt class="py-op">.</tt><tt class="py-name">GetNameOfCol</tt><tt class="py-op">(</tt><tt class="py-name">iCol</tt><tt class="py-op">)</tt> </tt>
<a name="L615"></a><tt class="py-lineno">615</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">sCol</tt><tt class="py-op">.</tt><tt class="py-name">upper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt class="py-string">'VALUE'</tt><tt class="py-op">:</tt> </tt>
<a name="L616"></a><tt class="py-lineno">616</tt>  <tt class="py-line">            <tt class="py-name">rgbcols</tt><tt class="py-op">[</tt><tt class="py-string">'VALUE'</tt><tt class="py-op">]</tt><tt class="py-op">=</tt><tt class="py-name">iCol</tt> </tt>
<a name="L617"></a><tt class="py-lineno">617</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">sCol</tt><tt class="py-op">.</tt><tt class="py-name">upper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> <tt class="py-keyword">in</tt> <tt class="py-op">[</tt><tt class="py-string">'R'</tt><tt class="py-op">,</tt><tt class="py-string">'RED'</tt><tt class="py-op">]</tt><tt class="py-op">:</tt> </tt>
<a name="L618"></a><tt class="py-lineno">618</tt>  <tt class="py-line">            <tt class="py-name">rgbcols</tt><tt class="py-op">[</tt><tt class="py-string">'R'</tt><tt class="py-op">]</tt><tt class="py-op">=</tt><tt class="py-name">iCol</tt> </tt>
<a name="L619"></a><tt class="py-lineno">619</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">sCol</tt><tt class="py-op">.</tt><tt class="py-name">upper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> <tt class="py-keyword">in</tt> <tt class="py-op">[</tt><tt class="py-string">'G'</tt><tt class="py-op">,</tt><tt class="py-string">'GREEN'</tt><tt class="py-op">]</tt><tt class="py-op">:</tt> </tt>
<a name="L620"></a><tt class="py-lineno">620</tt>  <tt class="py-line">            <tt class="py-name">rgbcols</tt><tt class="py-op">[</tt><tt class="py-string">'G'</tt><tt class="py-op">]</tt><tt class="py-op">=</tt><tt class="py-name">iCol</tt> </tt>
<a name="L621"></a><tt class="py-lineno">621</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">sCol</tt><tt class="py-op">.</tt><tt class="py-name">upper</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> <tt class="py-keyword">in</tt> <tt class="py-op">[</tt><tt class="py-string">'B'</tt><tt class="py-op">,</tt><tt class="py-string">'BLUE'</tt><tt class="py-op">]</tt><tt class="py-op">:</tt> </tt>
<a name="L622"></a><tt class="py-lineno">622</tt>  <tt class="py-line">            <tt class="py-name">rgbcols</tt><tt class="py-op">[</tt><tt class="py-string">'B'</tt><tt class="py-op">]</tt><tt class="py-op">=</tt><tt class="py-name">iCol</tt> </tt>
<a name="L623"></a><tt class="py-lineno">623</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt class="py-name">sorted</tt><tt class="py-op">(</tt><tt class="py-name">rgbcols</tt><tt class="py-op">.</tt><tt class="py-name">keys</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt class="py-op">[</tt><tt class="py-string">'B'</tt><tt class="py-op">,</tt> <tt class="py-string">'G'</tt><tt class="py-op">,</tt> <tt class="py-string">'R'</tt><tt class="py-op">,</tt><tt class="py-string">'VALUE'</tt><tt class="py-op">]</tt><tt class="py-op">:</tt> </tt>
<a name="L624"></a><tt class="py-lineno">624</tt>  <tt class="py-line">        <tt class="py-name">clr</tt><tt class="py-op">,</tt><tt class="py-name">vals</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt><tt class="py-op">,</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L625"></a><tt class="py-lineno">625</tt>  <tt class="py-line">        <tt class="py-keyword">for</tt> <tt class="py-name">iRow</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-name">rat</tt><tt class="py-op">.</tt><tt class="py-name">GetRowCount</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">:</tt><tt class="py-comment">#+1):</tt> </tt>
<a name="L626"></a><tt class="py-lineno">626</tt>  <tt class="py-line">            <tt class="py-name">val</tt><tt class="py-op">=</tt><tt class="py-name">rat</tt><tt class="py-op">.</tt><tt class="py-name">GetValueAsInt</tt><tt class="py-op">(</tt><tt class="py-name">iRow</tt><tt class="py-op">,</tt><tt class="py-name">rgbcols</tt><tt class="py-op">[</tt><tt class="py-string">'VALUE'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L627"></a><tt class="py-lineno">627</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">val</tt> <tt class="py-keyword">in</tt> <tt class="py-name">vals</tt><tt class="py-op">:</tt> <tt class="py-comment">#Have been getting VALUE=0,COUNT=0 as the last row</tt> </tt>
<a name="L628"></a><tt class="py-lineno">628</tt>  <tt class="py-line">                                <tt class="py-comment">#in the ESRI grids I've tested on, even if 0 is already in the VAT</tt> </tt>
<a name="L629"></a><tt class="py-lineno">629</tt>  <tt class="py-line">                <tt id="link-49" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-49', 'r', 'link-34');">r</a></tt><tt class="py-op">=</tt><tt class="py-name">rat</tt><tt class="py-op">.</tt><tt class="py-name">GetValueAsDouble</tt><tt class="py-op">(</tt><tt class="py-name">iRow</tt><tt class="py-op">,</tt><tt class="py-name">rgbcols</tt><tt class="py-op">[</tt><tt class="py-string">'R'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L630"></a><tt class="py-lineno">630</tt>  <tt class="py-line">                <tt class="py-keyword">if</tt> <tt id="link-50" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-50', 'r', 'link-34');">r</a></tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0</tt> <tt class="py-keyword">and</tt> <tt id="link-51" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-51', 'r', 'link-34');">r</a></tt> <tt class="py-op">&lt;</tt> <tt class="py-number">1</tt><tt class="py-op">:</tt><tt id="link-52" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-52', 'r', 'link-34');">r</a></tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt id="link-53" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-53', 'r', 'link-34');">r</a></tt><tt class="py-op">*</tt><tt class="py-number">255</tt><tt class="py-op">)</tt> </tt>
<a name="L631"></a><tt class="py-lineno">631</tt>  <tt class="py-line">                <tt class="py-name">g</tt><tt class="py-op">=</tt><tt class="py-name">rat</tt><tt class="py-op">.</tt><tt class="py-name">GetValueAsDouble</tt><tt class="py-op">(</tt><tt class="py-name">iRow</tt><tt class="py-op">,</tt><tt class="py-name">rgbcols</tt><tt class="py-op">[</tt><tt class="py-string">'G'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L632"></a><tt class="py-lineno">632</tt>  <tt class="py-line">                <tt class="py-keyword">if</tt> <tt class="py-name">g</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0</tt> <tt class="py-keyword">and</tt> <tt class="py-name">g</tt> <tt class="py-op">&lt;</tt> <tt class="py-number">1</tt><tt class="py-op">:</tt><tt class="py-name">g</tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">g</tt><tt class="py-op">*</tt><tt class="py-number">255</tt><tt class="py-op">)</tt> </tt>
<a name="L633"></a><tt class="py-lineno">633</tt>  <tt class="py-line">                <tt class="py-name">b</tt><tt class="py-op">=</tt><tt class="py-name">rat</tt><tt class="py-op">.</tt><tt class="py-name">GetValueAsDouble</tt><tt class="py-op">(</tt><tt class="py-name">iRow</tt><tt class="py-op">,</tt><tt class="py-name">rgbcols</tt><tt class="py-op">[</tt><tt class="py-string">'B'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L634"></a><tt class="py-lineno">634</tt>  <tt class="py-line">                <tt class="py-keyword">if</tt> <tt class="py-name">b</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0</tt> <tt class="py-keyword">and</tt> <tt class="py-name">b</tt> <tt class="py-op">&lt;</tt> <tt class="py-number">1</tt><tt class="py-op">:</tt><tt class="py-name">b</tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">b</tt><tt class="py-op">*</tt><tt class="py-number">255</tt><tt class="py-op">)</tt> </tt>
<a name="L635"></a><tt class="py-lineno">635</tt>  <tt class="py-line">                <tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">val</tt><tt class="py-op">)</tt> </tt>
<a name="L636"></a><tt class="py-lineno">636</tt>  <tt class="py-line">                <tt class="py-name">clr</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">val</tt><tt class="py-op">,</tt><tt id="link-54" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-54', 'r', 'link-34');">r</a></tt><tt class="py-op">,</tt><tt class="py-name">g</tt><tt class="py-op">,</tt><tt class="py-name">b</tt><tt class="py-op">,</tt><tt class="py-number">255</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L637"></a><tt class="py-lineno">637</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">clr</tt> </tt>
<a name="L638"></a><tt class="py-lineno">638</tt>  <tt class="py-line">    <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L639"></a><tt class="py-lineno">639</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">None</tt> </tt>
</div><a name="L640"></a><tt class="py-lineno">640</tt>  <tt class="py-line"> </tt>
<a name="ParseColourLUT"></a><div id="ParseColourLUT-def"><a name="L641"></a><tt class="py-lineno">641</tt> <a class="py-toggle" href="#" id="ParseColourLUT-toggle" onclick="return toggle('ParseColourLUT');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#ParseColourLUT">ParseColourLUT</a><tt class="py-op">(</tt><tt class="py-param">filepath</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="ParseColourLUT-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="ParseColourLUT-expanded"><a name="L642"></a><tt class="py-lineno">642</tt>  <tt class="py-line">    <tt class="py-docstring">''' Open and parse a colour lookup table</tt> </tt>
<a name="L643"></a><tt class="py-lineno">643</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L644"></a><tt class="py-lineno">644</tt>  <tt class="py-line"><tt class="py-docstring">        Values must be space separated. Comment characters are stripped out.</tt> </tt>
<a name="L645"></a><tt class="py-lineno">645</tt>  <tt class="py-line"><tt class="py-docstring">        Format is: C{pixel red green blue [optional alpha]}.</tt> </tt>
<a name="L646"></a><tt class="py-lineno">646</tt>  <tt class="py-line"><tt class="py-docstring">        Pixel value may be a range (eg 15-20).</tt> </tt>
<a name="L647"></a><tt class="py-lineno">647</tt>  <tt class="py-line"><tt class="py-docstring">        The following comment characters may be used: C{'#' '//' ';' '/*'}.</tt> </tt>
<a name="L648"></a><tt class="py-lineno">648</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L649"></a><tt class="py-lineno">649</tt>  <tt class="py-line"><tt class="py-docstring">        Example::</tt> </tt>
<a name="L650"></a><tt class="py-lineno">650</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L651"></a><tt class="py-lineno">651</tt>  <tt class="py-line"><tt class="py-docstring">                #value   R   G   B   A</tt> </tt>
<a name="L652"></a><tt class="py-lineno">652</tt>  <tt class="py-line"><tt class="py-docstring">                 11-15   255 0   0   255 #(red)</tt> </tt>
<a name="L653"></a><tt class="py-lineno">653</tt>  <tt class="py-line"><tt class="py-docstring">                 16      255 165 0   255 #(orange)</tt> </tt>
<a name="L654"></a><tt class="py-lineno">654</tt>  <tt class="py-line"><tt class="py-docstring">                 18      255 255 0   255 #(yellow)</tt> </tt>
<a name="L655"></a><tt class="py-lineno">655</tt>  <tt class="py-line"><tt class="py-docstring">                 19      0   255 0   255 /*(green)</tt> </tt>
<a name="L656"></a><tt class="py-lineno">656</tt>  <tt class="py-line"><tt class="py-docstring">                 21      0   0   255 255 /*(blue)</tt> </tt>
<a name="L657"></a><tt class="py-lineno">657</tt>  <tt class="py-line"><tt class="py-docstring">                 98      0   255 255 255 ;(cyan)</tt> </tt>
<a name="L658"></a><tt class="py-lineno">658</tt>  <tt class="py-line"><tt class="py-docstring">                 99-255  160 32  240 255 ;(purple)</tt> </tt>
<a name="L659"></a><tt class="py-lineno">659</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L660"></a><tt class="py-lineno">660</tt>  <tt class="py-line"><tt class="py-docstring">        @type filepath:   C{str}</tt> </tt>
<a name="L661"></a><tt class="py-lineno">661</tt>  <tt class="py-line"><tt class="py-docstring">        @param filepath:  Path to colour lookup file</tt> </tt>
<a name="L662"></a><tt class="py-lineno">662</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:           C{list}</tt> </tt>
<a name="L663"></a><tt class="py-lineno">663</tt>  <tt class="py-line"><tt class="py-docstring">        @return:          List of cell values and R,G,B,A values e.g ((12,0,0,0,255), (25,255,255,255,0))</tt> </tt>
<a name="L664"></a><tt class="py-lineno">664</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L665"></a><tt class="py-lineno">665</tt>  <tt class="py-line">    <tt class="py-name">commentchars</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-string">'#'</tt><tt class="py-op">,</tt><tt class="py-string">'//'</tt><tt class="py-op">,</tt><tt class="py-string">';'</tt><tt class="py-op">,</tt><tt class="py-string">'/*'</tt><tt class="py-op">]</tt> </tt>
<a name="L666"></a><tt class="py-lineno">666</tt>  <tt class="py-line">    <tt class="py-name">lut</tt><tt class="py-op">=</tt><tt class="py-name">open</tt><tt class="py-op">(</tt><tt class="py-name">filepath</tt><tt class="py-op">,</tt><tt class="py-string">'r'</tt><tt class="py-op">)</tt> </tt>
<a name="L667"></a><tt class="py-lineno">667</tt>  <tt class="py-line">    <tt class="py-name">clr</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L668"></a><tt class="py-lineno">668</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">line</tt> <tt class="py-keyword">in</tt> <tt class="py-name">lut</tt><tt class="py-op">:</tt> </tt>
<a name="L669"></a><tt class="py-lineno">669</tt>  <tt class="py-line">        <tt class="py-name">line</tt><tt class="py-op">=</tt><tt class="py-name">line</tt><tt class="py-op">.</tt><tt class="py-name">strip</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L670"></a><tt class="py-lineno">670</tt>  <tt class="py-line"> </tt>
<a name="L671"></a><tt class="py-lineno">671</tt>  <tt class="py-line">        <tt class="py-comment">#strip out comment characters</tt> </tt>
<a name="L672"></a><tt class="py-lineno">672</tt>  <tt class="py-line">        <tt class="py-keyword">for</tt> <tt class="py-name">char</tt> <tt class="py-keyword">in</tt> <tt class="py-name">commentchars</tt><tt class="py-op">:</tt> </tt>
<a name="L673"></a><tt class="py-lineno">673</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">line</tt><tt class="py-op">.</tt><tt class="py-name">find</tt><tt class="py-op">(</tt><tt class="py-name">char</tt><tt class="py-op">)</tt> <tt class="py-op">&gt;=</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
<a name="L674"></a><tt class="py-lineno">674</tt>  <tt class="py-line">                <tt class="py-name">line</tt><tt class="py-op">=</tt><tt class="py-name">line</tt><tt class="py-op">.</tt><tt class="py-name">split</tt><tt class="py-op">(</tt><tt class="py-name">char</tt><tt class="py-op">)</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">strip</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L675"></a><tt class="py-lineno">675</tt>  <tt class="py-line"> </tt>
<a name="L676"></a><tt class="py-lineno">676</tt>  <tt class="py-line">        <tt class="py-comment">#Split into pixel, red, green, blue, alpha values</tt> </tt>
<a name="L677"></a><tt class="py-lineno">677</tt>  <tt class="py-line">        <tt class="py-comment">#if optional alpha value was not included, add it in (255 = non-transparent)</tt> </tt>
<a name="L678"></a><tt class="py-lineno">678</tt>  <tt class="py-line">        <tt class="py-name">line</tt><tt class="py-op">=</tt><tt class="py-name">line</tt><tt class="py-op">.</tt><tt class="py-name">split</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L679"></a><tt class="py-lineno">679</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">line</tt><tt class="py-op">)</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> <tt class="py-comment">#If it's not a comment line</tt> </tt>
<a name="L680"></a><tt class="py-lineno">680</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">line</tt><tt class="py-op">)</tt> <tt class="py-op">&lt;</tt> <tt class="py-number">4</tt> <tt class="py-keyword">or</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">line</tt><tt class="py-op">)</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">5</tt><tt class="py-op">:</tt> <tt class="py-keyword">raise</tt> <tt class="py-name">Exception</tt><tt class="py-op">,</tt> <tt class="py-string">'Unable to process %s'</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">f</tt><tt class="py-op">)</tt> </tt>
<a name="L681"></a><tt class="py-lineno">681</tt>  <tt class="py-line">            <tt class="py-keyword">elif</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">line</tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt class="py-number">4</tt><tt class="py-op">:</tt> <tt class="py-name">line</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-string">'255'</tt><tt class="py-op">)</tt> <tt class="py-comment">#Is it just pixel, r, g, b?</tt> </tt>
<a name="L682"></a><tt class="py-lineno">682</tt>  <tt class="py-line"> </tt>
<a name="L683"></a><tt class="py-lineno">683</tt>  <tt class="py-line">            <tt class="py-comment">#Check for range of pixel values</tt> </tt>
<a name="L684"></a><tt class="py-lineno">684</tt>  <tt class="py-line">            <tt class="py-name">sep</tt><tt class="py-op">=</tt><tt class="py-name">line</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">find</tt><tt class="py-op">(</tt><tt class="py-string">'-'</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L685"></a><tt class="py-lineno">685</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">sep</tt> <tt class="py-op">!=</tt> <tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">:</tt> </tt>
<a name="L686"></a><tt class="py-lineno">686</tt>  <tt class="py-line">                <tt id="link-55" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-55', 'r', 'link-34');">r</a></tt><tt class="py-op">,</tt><tt class="py-name">g</tt><tt class="py-op">,</tt><tt class="py-name">b</tt><tt class="py-op">,</tt><tt class="py-name">a</tt><tt class="py-op">=</tt><tt class="py-name">line</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> </tt>
<a name="L687"></a><tt class="py-lineno">687</tt>  <tt class="py-line">                <tt class="py-name">i</tt><tt class="py-op">,</tt><tt class="py-name">j</tt><tt class="py-op">=</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">line</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-name">sep</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">line</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-name">sep</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">:</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L688"></a><tt class="py-lineno">688</tt>  <tt class="py-line">                <tt class="py-keyword">for</tt> <tt class="py-name">val</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">i</tt><tt class="py-op">,</tt><tt class="py-name">j</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L689"></a><tt class="py-lineno">689</tt>  <tt class="py-line">                    <tt class="py-name">line</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">val</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt id="link-56" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-56', 'r', 'link-34');">r</a></tt><tt class="py-op">,</tt><tt class="py-name">g</tt><tt class="py-op">,</tt><tt class="py-name">b</tt><tt class="py-op">,</tt><tt class="py-name">a</tt><tt class="py-op">]</tt> </tt>
<a name="L690"></a><tt class="py-lineno">690</tt>  <tt class="py-line">                    <tt class="py-name">clr</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">line</tt><tt class="py-op">)</tt> </tt>
<a name="L691"></a><tt class="py-lineno">691</tt>  <tt class="py-line">            <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L692"></a><tt class="py-lineno">692</tt>  <tt class="py-line">                <tt class="py-name">clr</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">line</tt><tt class="py-op">)</tt> </tt>
<a name="L693"></a><tt class="py-lineno">693</tt>  <tt class="py-line">    <tt class="py-comment">#close and exit</tt> </tt>
<a name="L694"></a><tt class="py-lineno">694</tt>  <tt class="py-line">    <tt class="py-name">lut</tt><tt class="py-op">.</tt><tt id="link-57" class="py-name"><a title="metageta.progresslogger.ProgressLoggerHandler.close" class="py-name" href="#" onclick="return doclink('link-57', 'close', 'link-15');">close</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L695"></a><tt class="py-lineno">695</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">clr</tt> </tt>
</div><a name="L696"></a><tt class="py-lineno">696</tt>  <tt class="py-line"><tt class="py-name">ParseColorLUT</tt><tt class="py-op">=</tt><tt id="link-58" class="py-name" targets="Function metageta.overviews.ParseColourLUT()=metageta.overviews-module.html#ParseColourLUT"><a title="metageta.overviews.ParseColourLUT" class="py-name" href="#" onclick="return doclink('link-58', 'ParseColourLUT', 'link-58');">ParseColourLUT</a></tt> <tt class="py-comment">#Synonym for the norteamericanos</tt> </tt>
<a name="ColourLUT"></a><div id="ColourLUT-def"><a name="L697"></a><tt class="py-lineno">697</tt> <a class="py-toggle" href="#" id="ColourLUT-toggle" onclick="return toggle('ColourLUT');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#ColourLUT">ColourLUT</a><tt class="py-op">(</tt><tt class="py-param">lut</tt><tt class="py-op">,</tt><tt class="py-param">rb</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="ColourLUT-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="ColourLUT-expanded"><a name="L698"></a><tt class="py-lineno">698</tt>  <tt class="py-line">    <tt class="py-docstring">''' Populate a colour lookup table, making sure all values get included</tt> </tt>
<a name="L699"></a><tt class="py-lineno">699</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L700"></a><tt class="py-lineno">700</tt>  <tt class="py-line"><tt class="py-docstring">        @type lut:  C{list}</tt> </tt>
<a name="L701"></a><tt class="py-lineno">701</tt>  <tt class="py-line"><tt class="py-docstring">        @param lut: A list of one or more [values,r,g,b,a] lists.</tt> </tt>
<a name="L702"></a><tt class="py-lineno">702</tt>  <tt class="py-line"><tt class="py-docstring">        @type rb:   C{gdal.RasterBand}</tt> </tt>
<a name="L703"></a><tt class="py-lineno">703</tt>  <tt class="py-line"><tt class="py-docstring">        @param rb:  A gdal RasterBand object.</tt> </tt>
<a name="L704"></a><tt class="py-lineno">704</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:     C{list}</tt> </tt>
<a name="L705"></a><tt class="py-lineno">705</tt>  <tt class="py-line"><tt class="py-docstring">        @return:    A list of one or more [values,r,g,b,a] lists.</tt> </tt>
<a name="L706"></a><tt class="py-lineno">706</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L707"></a><tt class="py-lineno">707</tt>  <tt class="py-line">    <tt class="py-name">clr</tt><tt class="py-op">=</tt><tt class="py-name">dict</tt><tt class="py-op">(</tt><tt class="py-op">(</tt><tt class="py-name">key</tt><tt class="py-op">,</tt><tt class="py-name">val</tt><tt class="py-op">)</tt> <tt class="py-keyword">for</tt> <tt class="py-name">key</tt><tt class="py-op">,</tt><tt class="py-name">val</tt> <tt class="py-keyword">in</tt> <tt class="py-op">[</tt><tt class="py-op">[</tt><tt class="py-name">v</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">,</tt><tt class="py-name">v</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">:</tt><tt class="py-op">]</tt><tt class="py-op">]</tt> <tt class="py-keyword">for</tt> <tt class="py-name">v</tt> <tt class="py-keyword">in</tt> <tt class="py-name">lut</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L708"></a><tt class="py-lineno">708</tt>  <tt class="py-line">    <tt class="py-name">nodata</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetNoDataValue</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L709"></a><tt class="py-lineno">709</tt>  <tt class="py-line">    <tt class="py-name">min</tt><tt class="py-op">,</tt><tt class="py-name">max</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">ComputeRasterMinMax</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L710"></a><tt class="py-lineno">710</tt>  <tt class="py-line">    <tt class="py-name">rat</tt><tt class="py-op">=</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">GetHistogram</tt><tt class="py-op">(</tt><tt class="py-name">min</tt><tt class="py-op">-</tt><tt class="py-number">0.5</tt><tt class="py-op">,</tt><tt class="py-name">max</tt><tt class="py-op">+</tt><tt class="py-number">0.5</tt><tt class="py-op">,</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">max</tt><tt class="py-op">-</tt><tt class="py-name">min</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L711"></a><tt class="py-lineno">711</tt>  <tt class="py-line">    <tt class="py-name">vals</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L712"></a><tt class="py-lineno">712</tt>  <tt class="py-line">    <tt class="py-name">keys</tt><tt class="py-op">=</tt><tt class="py-name">clr</tt><tt class="py-op">.</tt><tt class="py-name">keys</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L713"></a><tt class="py-lineno">713</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt class="py-name">val</tt><tt class="py-op">,</tt><tt class="py-name">count</tt> <tt class="py-keyword">in</tt> <tt class="py-name">zip</tt><tt class="py-op">(</tt><tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">min</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">max</tt><tt class="py-op">)</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-name">rat</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L714"></a><tt class="py-lineno">714</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">count</tt> <tt class="py-op">&gt;</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
<a name="L715"></a><tt class="py-lineno">715</tt>  <tt class="py-line">            <tt class="py-name">val</tt><tt class="py-op">=</tt><tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">val</tt><tt class="py-op">)</tt> </tt>
<a name="L716"></a><tt class="py-lineno">716</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">val</tt> <tt class="py-keyword">in</tt> <tt class="py-name">keys</tt><tt class="py-op">:</tt> </tt>
<a name="L717"></a><tt class="py-lineno">717</tt>  <tt class="py-line">                <tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">val</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L718"></a><tt class="py-lineno">718</tt>  <tt class="py-line">                <tt class="py-name">vals</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">extend</tt><tt class="py-op">(</tt><tt class="py-name">clr</tt><tt class="py-op">[</tt><tt class="py-name">val</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L719"></a><tt class="py-lineno">719</tt>  <tt class="py-line">            <tt class="py-keyword">else</tt><tt class="py-op">:</tt><tt class="py-name">vals</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">val</tt><tt class="py-op">,</tt><tt class="py-string">'255'</tt><tt class="py-op">,</tt><tt class="py-string">'255'</tt><tt class="py-op">,</tt><tt class="py-string">'255'</tt><tt class="py-op">,</tt><tt class="py-string">'0'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L720"></a><tt class="py-lineno">720</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">vals</tt> </tt>
</div><a name="L721"></a><tt class="py-lineno">721</tt>  <tt class="py-line">    <tt class="py-comment">#Not all entries in colourtable occur in the dataset</tt> </tt>
<a name="L722"></a><tt class="py-lineno">722</tt>  <tt class="py-line">    <tt class="py-comment">#return [map(str, col) for col in lut]</tt> </tt>
<a name="L723"></a><tt class="py-lineno">723</tt>  <tt class="py-line"><tt class="py-name">ColorLUT</tt><tt class="py-op">=</tt><tt id="link-59" class="py-name"><a title="metageta.overviews.ColourLUT" class="py-name" href="#" onclick="return doclink('link-59', 'ColourLUT', 'link-44');">ColourLUT</a></tt> <tt class="py-comment">#Synonym for the norteamericanos</tt> </tt>
<a name="ExpandedColourLUT"></a><div id="ExpandedColourLUT-def"><a name="L724"></a><tt class="py-lineno">724</tt> <a class="py-toggle" href="#" id="ExpandedColourLUT-toggle" onclick="return toggle('ExpandedColourLUT');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#ExpandedColourLUT">ExpandedColourLUT</a><tt class="py-op">(</tt><tt class="py-param">lut</tt><tt class="py-op">,</tt><tt class="py-param">rb</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="ExpandedColourLUT-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="ExpandedColourLUT-expanded"><a name="L725"></a><tt class="py-lineno">725</tt>  <tt class="py-line">    <tt class="py-docstring">''' Populate a colour lookup table, expanding missing values as required.</tt> </tt>
<a name="L726"></a><tt class="py-lineno">726</tt>  <tt class="py-line"><tt class="py-docstring">        Workaround for http://trac.osgeo.org/gdal/ticket/3253</tt> </tt>
<a name="L727"></a><tt class="py-lineno">727</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L728"></a><tt class="py-lineno">728</tt>  <tt class="py-line"><tt class="py-docstring">        @type lut:  C{list}</tt> </tt>
<a name="L729"></a><tt class="py-lineno">729</tt>  <tt class="py-line"><tt class="py-docstring">        @param lut: A list of one or more [values,r,g,b,a] lists.</tt> </tt>
<a name="L730"></a><tt class="py-lineno">730</tt>  <tt class="py-line"><tt class="py-docstring">        @type rb:   C{gdal.RasterBand}</tt> </tt>
<a name="L731"></a><tt class="py-lineno">731</tt>  <tt class="py-line"><tt class="py-docstring">        @param rb:  A gdal RasterBand object.</tt> </tt>
<a name="L732"></a><tt class="py-lineno">732</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:     C{list}</tt> </tt>
<a name="L733"></a><tt class="py-lineno">733</tt>  <tt class="py-line"><tt class="py-docstring">        @return:    A list of one or more [values,r,g,b,a] lists.</tt> </tt>
<a name="L734"></a><tt class="py-lineno">734</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L735"></a><tt class="py-lineno">735</tt>  <tt class="py-line">    <tt class="py-name">lut</tt><tt class="py-op">=</tt><tt class="py-name">iter</tt><tt class="py-op">(</tt><tt class="py-name">lut</tt><tt class="py-op">)</tt> </tt>
<a name="L736"></a><tt class="py-lineno">736</tt>  <tt class="py-line">    <tt class="py-name">tbl</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L737"></a><tt class="py-lineno">737</tt>  <tt class="py-line">    <tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">=</tt><tt id="link-60" class="py-name"><a title="metageta.overviews.GetDataTypeRange" class="py-name" href="#" onclick="return doclink('link-60', 'GetDataTypeRange', 'link-20');">GetDataTypeRange</a></tt><tt class="py-op">(</tt><tt class="py-name">rb</tt><tt class="py-op">.</tt><tt class="py-name">DataType</tt><tt class="py-op">)</tt> </tt>
<a name="L738"></a><tt class="py-lineno">738</tt>  <tt class="py-line">    <tt class="py-name">rng</tt><tt class="py-op">=</tt><tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">dfScaleSrcMin</tt><tt class="py-op">,</tt><tt class="py-name">dfScaleSrcMax</tt><tt class="py-op">)</tt> </tt>
<a name="L739"></a><tt class="py-lineno">739</tt>  <tt class="py-line">    <tt class="py-name">val</tt><tt class="py-op">,</tt><tt class="py-name">red</tt><tt class="py-op">,</tt><tt class="py-name">green</tt><tt class="py-op">,</tt><tt class="py-name">blue</tt><tt class="py-op">,</tt><tt class="py-name">alpha</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">v</tt><tt class="py-op">)</tt> <tt class="py-keyword">for</tt> <tt class="py-name">v</tt> <tt class="py-keyword">in</tt> <tt class="py-name">lut</tt><tt class="py-op">.</tt><tt id="link-61" class="py-name" targets="Method metageta.crawler.Crawler.next()=metageta.crawler.Crawler-class.html#next"><a title="metageta.crawler.Crawler.next" class="py-name" href="#" onclick="return doclink('link-61', 'next', 'link-61');">next</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">]</tt> </tt>
<a name="L740"></a><tt class="py-lineno">740</tt>  <tt class="py-line">    <tt class="py-keyword">for</tt> <tt id="link-62" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-62', 'r', 'link-34');">r</a></tt> <tt class="py-keyword">in</tt> <tt class="py-name">rng</tt><tt class="py-op">:</tt> </tt>
<a name="L741"></a><tt class="py-lineno">741</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">val</tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt id="link-63" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-63', 'r', 'link-34');">r</a></tt><tt class="py-op">:</tt> </tt>
<a name="L742"></a><tt class="py-lineno">742</tt>  <tt class="py-line">            <tt class="py-name">clr</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">str</tt><tt class="py-op">(</tt><tt id="link-64" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-64', 'r', 'link-34');">r</a></tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-name">red</tt><tt class="py-op">,</tt><tt class="py-name">green</tt><tt class="py-op">,</tt><tt class="py-name">blue</tt><tt class="py-op">,</tt><tt class="py-name">alpha</tt><tt class="py-op">)</tt> </tt>
<a name="L743"></a><tt class="py-lineno">743</tt>  <tt class="py-line">            <tt class="py-keyword">try</tt><tt class="py-op">:</tt><tt class="py-name">val</tt><tt class="py-op">,</tt><tt class="py-name">red</tt><tt class="py-op">,</tt><tt class="py-name">green</tt><tt class="py-op">,</tt><tt class="py-name">blue</tt><tt class="py-op">,</tt><tt class="py-name">alpha</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">v</tt><tt class="py-op">)</tt> <tt class="py-keyword">for</tt> <tt class="py-name">v</tt> <tt class="py-keyword">in</tt> <tt class="py-name">lut</tt><tt class="py-op">.</tt><tt id="link-65" class="py-name"><a title="metageta.crawler.Crawler.next" class="py-name" href="#" onclick="return doclink('link-65', 'next', 'link-61');">next</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">]</tt> </tt>
<a name="L744"></a><tt class="py-lineno">744</tt>  <tt class="py-line">            <tt class="py-keyword">except</tt><tt class="py-op">:</tt><tt class="py-keyword">pass</tt> <tt class="py-comment">#No more color table entries</tt> </tt>
<a name="L745"></a><tt class="py-lineno">745</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt><tt class="py-name">clr</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">str</tt><tt class="py-op">(</tt><tt id="link-66" class="py-name"><a title="metageta.formats.r" class="py-name" href="#" onclick="return doclink('link-66', 'r', 'link-34');">r</a></tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-string">'255'</tt><tt class="py-op">,</tt><tt class="py-string">'255'</tt><tt class="py-op">,</tt><tt class="py-string">'255'</tt><tt class="py-op">,</tt><tt class="py-string">'0'</tt><tt class="py-op">)</tt> <tt class="py-comment">#default - white/transparent</tt> </tt>
<a name="L746"></a><tt class="py-lineno">746</tt>  <tt class="py-line">        <tt class="py-name">tbl</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">clr</tt><tt class="py-op">)</tt> </tt>
<a name="L747"></a><tt class="py-lineno">747</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">tbl</tt> </tt>
</div><a name="L748"></a><tt class="py-lineno">748</tt>  <tt class="py-line"><tt class="py-name">ExpandedColorLUT</tt><tt class="py-op">=</tt><tt id="link-67" class="py-name" targets="Function metageta.overviews.ExpandedColourLUT()=metageta.overviews-module.html#ExpandedColourLUT"><a title="metageta.overviews.ExpandedColourLUT" class="py-name" href="#" onclick="return doclink('link-67', 'ExpandedColourLUT', 'link-67');">ExpandedColourLUT</a></tt> <tt class="py-comment">#Synonym for the norteamericanos</tt> </tt>
<a name="L749"></a><tt class="py-lineno">749</tt>  <tt class="py-line"><tt class="py-comment">#Workaround for missing values http://trac.osgeo.org/gdal/ticket/3253</tt> </tt>
<a name="L750"></a><tt class="py-lineno">750</tt>  <tt class="py-line"><tt class="py-keyword">if</tt> <tt class="py-name">int</tt><tt class="py-op">(</tt><tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt class="py-name">VersionInfo</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-number">2</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> <tt class="py-op">&lt;</tt> <tt class="py-number">17</tt><tt class="py-op">:</tt> <tt class="py-comment">#Missing values fixed in 1.7+</tt> </tt>
<a name="L751"></a><tt class="py-lineno">751</tt>  <tt class="py-line">    <tt id="link-68" class="py-name"><a title="metageta.overviews.ColourLUT" class="py-name" href="#" onclick="return doclink('link-68', 'ColourLUT', 'link-44');">ColourLUT</a></tt> <tt class="py-op">=</tt> <tt id="link-69" class="py-name"><a title="metageta.overviews.ExpandedColourLUT" class="py-name" href="#" onclick="return doclink('link-69', 'ExpandedColourLUT', 'link-67');">ExpandedColourLUT</a></tt> </tt>
<a name="L752"></a><tt class="py-lineno">752</tt>  <tt class="py-line">    <tt class="py-name">ColorLUT</tt>  <tt class="py-op">=</tt> <tt class="py-name">ExpandedColorLUT</tt> </tt>
<a name="L753"></a><tt class="py-lineno">753</tt>  <tt class="py-line"> </tt>
<a name="resize"></a><div id="resize-def"><a name="L754"></a><tt class="py-lineno">754</tt> <a class="py-toggle" href="#" id="resize-toggle" onclick="return toggle('resize');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="metageta.overviews-module.html#resize">resize</a><tt class="py-op">(</tt><tt class="py-param">infile</tt><tt class="py-op">,</tt><tt class="py-param">outfile</tt><tt class="py-op">,</tt><tt class="py-param">width</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="resize-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="resize-expanded"><a name="L755"></a><tt class="py-lineno">755</tt>  <tt class="py-line">    <tt class="py-docstring">''' Resize an image</tt> </tt>
<a name="L756"></a><tt class="py-lineno">756</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L757"></a><tt class="py-lineno">757</tt>  <tt class="py-line"><tt class="py-docstring">        @type infile:   C{str}</tt> </tt>
<a name="L758"></a><tt class="py-lineno">758</tt>  <tt class="py-line"><tt class="py-docstring">        @param infile:  Path to image to resize</tt> </tt>
<a name="L759"></a><tt class="py-lineno">759</tt>  <tt class="py-line"><tt class="py-docstring">        @type outfile:   C{str}</tt> </tt>
<a name="L760"></a><tt class="py-lineno">760</tt>  <tt class="py-line"><tt class="py-docstring">        @param outfile:  Path to output image that will be created</tt> </tt>
<a name="L761"></a><tt class="py-lineno">761</tt>  <tt class="py-line"><tt class="py-docstring">        @type width:    C{int}</tt> </tt>
<a name="L762"></a><tt class="py-lineno">762</tt>  <tt class="py-line"><tt class="py-docstring">        @param width:   Width in pixels of output image</tt> </tt>
<a name="L763"></a><tt class="py-lineno">763</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype:         C{str}</tt> </tt>
<a name="L764"></a><tt class="py-lineno">764</tt>  <tt class="py-line"><tt class="py-docstring">        @return:        Path to output image that was created</tt> </tt>
<a name="L765"></a><tt class="py-lineno">765</tt>  <tt class="py-line"><tt class="py-docstring">    '''</tt> </tt>
<a name="L766"></a><tt class="py-lineno">766</tt>  <tt class="py-line">    <tt class="py-name">ds</tt><tt class="py-op">=</tt><tt class="py-name">gdal</tt><tt class="py-op">.</tt><tt id="link-70" class="py-name" targets="Function metageta.formats.Open()=metageta.formats-module.html#Open"><a title="metageta.formats.Open" class="py-name" href="#" onclick="return doclink('link-70', 'Open', 'link-70');">Open</a></tt><tt class="py-op">(</tt><tt class="py-name">infile</tt><tt class="py-op">)</tt> </tt>
<a name="L767"></a><tt class="py-lineno">767</tt>  <tt class="py-line">    <tt class="py-name">bands</tt><tt class="py-op">=</tt><tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-name">ds</tt><tt class="py-op">.</tt><tt class="py-name">RasterCount</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
<a name="L768"></a><tt class="py-lineno">768</tt>  <tt class="py-line">    <tt class="py-name">outfile</tt> <tt class="py-op">=</tt>  <tt id="link-71" class="py-name" targets="Method metageta.formats.__dataset__.Dataset.getoverview()=metageta.formats.__dataset__.Dataset-class.html#getoverview,Method metageta.formats.alos.Dataset.getoverview()=metageta.formats.alos.Dataset-class.html#getoverview,Method metageta.formats.digitalglobe.Dataset.getoverview()=metageta.formats.digitalglobe.Dataset-class.html#getoverview,Method metageta.formats.dimap.Dataset.getoverview()=metageta.formats.dimap.Dataset-class.html#getoverview,Method metageta.formats.ecw.Dataset.getoverview()=metageta.formats.ecw.Dataset-class.html#getoverview,Method metageta.formats.esribil.Dataset.getoverview()=metageta.formats.esribil.Dataset-class.html#getoverview,Method metageta.formats.esrigrid.Dataset.getoverview()=metageta.formats.esrigrid.Dataset-class.html#getoverview,Method metageta.formats.geoeye.Dataset.getoverview()=metageta.formats.geoeye.Dataset-class.html#getoverview,Method metageta.formats.jp2.Dataset.getoverview()=metageta.formats.jp2.Dataset-class.html#getoverview,Method metageta.formats.netcdf.Dataset.getoverview()=metageta.formats.netcdf.Dataset-class.html#getoverview,Function metageta.overviews.getoverview()=metageta.overviews-module.html#getoverview"><a title="metageta.formats.__dataset__.Dataset.getoverview
metageta.formats.alos.Dataset.getoverview
metageta.formats.digitalglobe.Dataset.getoverview
metageta.formats.dimap.Dataset.getoverview
metageta.formats.ecw.Dataset.getoverview
metageta.formats.esribil.Dataset.getoverview
metageta.formats.esrigrid.Dataset.getoverview
metageta.formats.geoeye.Dataset.getoverview
metageta.formats.jp2.Dataset.getoverview
metageta.formats.netcdf.Dataset.getoverview
metageta.overviews.getoverview" class="py-name" href="#" onclick="return doclink('link-71', 'getoverview', 'link-71');">getoverview</a></tt><tt class="py-op">(</tt><tt class="py-name">ds</tt><tt class="py-op">,</tt><tt class="py-name">outfile</tt><tt class="py-op">,</tt><tt class="py-name">width</tt><tt class="py-op">,</tt><tt class="py-name">None</tt><tt class="py-op">,</tt><tt class="py-name">bands</tt><tt class="py-op">,</tt><tt class="py-string">'NONE'</tt><tt class="py-op">)</tt> </tt>
<a name="L769"></a><tt class="py-lineno">769</tt>  <tt class="py-line">    <tt class="py-keyword">del</tt> <tt class="py-name">ds</tt> </tt>
<a name="L770"></a><tt class="py-lineno">770</tt>  <tt class="py-line">    <tt class="py-keyword">return</tt> <tt class="py-name">outfile</tt> </tt>
</div><a name="L771"></a><tt class="py-lineno">771</tt>  <tt class="py-line"> </tt><script type="text/javascript">
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